"Since Cantonese, Shanghainese, and other nonstandard varieties differ from Mandarin not just in sound but also in vocabulary and grammar, the characters cannot bridge this gap by themselves, even with their relative neutrality toward sound.7 Much of the core vocabulary of non-Mandarin Chinese has no counterpart in Mandarin and no recognized character representation. Conversely, many Mandarin terms for which characters do exist are foreign to non-Mandarin speakers. The fact that nonstandard speakers can read a text in the standard language simply means that these speakers are bilingual. They have learned written Mandarin as a second language. They know enough vocabulary and grammar to make sense of Mandarin texts, much as I know enough French words and grammar to read that language (without being able to pronounce it convincingly, much less to speak it fluently). If Chinese characters have unified the Chinese languages, then the alphabet has unified French and English.
"The characters do allow nonstandard speakers to use their own pronunciations to read Mandarin texts. So instead of acclimating to the national standard, nonstandard speakers reinforce their own speech habits and add to the vitality of their "dialect" by introducing new vocabulary from Mandarin, which they pronounce their own way by analogy. Whether alphabetic scripts should be used to provide China's non-Mandarin speakers with the means to become literate in their own language is a political question outside the scope of the present inquiry. But one thing is certain: since non-Mandarin speakers are forced anyway to learn a second language, it would make more sense from the viewpoint of those promoting unity if this bilingualism were achieved through Mandarin written in the pinyin alphabet.8 The incentive to learn the national standard, including its pronunciation, would be higher than it is today if one's ability to read depended on it. As it is now, nonstandard speakers work their way through standard texts using whatever pronunciation comes naturally, not fully learning Mandarin and not reading their own languages either."
"Since Cantonese, Shanghainese, and other nonstandard varieties differ from Mandarin not just in sound but also in vocabulary and grammar, the characters cannot bridge this gap by themselves, even with their relative neutrality toward sound.7 Much of the core vocabulary of non-Mandarin Chinese has no counterpart in Mandarin and no recognized character representation. Conversely, many Mandarin terms for which characters do exist are foreign to non-Mandarin speakers."
Yes, the quoted statement is true. Observing examples of this phenomenon (in either direction, whether Mandarin speakers not being able to read other Sinitic languages in Chinese characters, or speakers of those languages not being able to read quite standard Mandarin in Chinese characters) was what motivated some of my earlier comments in this thread.
From: http://pinyin.info/readings/texts/chinesewriting.html
"Since Cantonese, Shanghainese, and other nonstandard varieties differ from Mandarin not just in sound but also in vocabulary and grammar, the characters cannot bridge this gap by themselves, even with their relative neutrality toward sound.7 Much of the core vocabulary of non-Mandarin Chinese has no counterpart in Mandarin and no recognized character representation. Conversely, many Mandarin terms for which characters do exist are foreign to non-Mandarin speakers. The fact that nonstandard speakers can read a text in the standard language simply means that these speakers are bilingual. They have learned written Mandarin as a second language. They know enough vocabulary and grammar to make sense of Mandarin texts, much as I know enough French words and grammar to read that language (without being able to pronounce it convincingly, much less to speak it fluently). If Chinese characters have unified the Chinese languages, then the alphabet has unified French and English.
"The characters do allow nonstandard speakers to use their own pronunciations to read Mandarin texts. So instead of acclimating to the national standard, nonstandard speakers reinforce their own speech habits and add to the vitality of their "dialect" by introducing new vocabulary from Mandarin, which they pronounce their own way by analogy. Whether alphabetic scripts should be used to provide China's non-Mandarin speakers with the means to become literate in their own language is a political question outside the scope of the present inquiry. But one thing is certain: since non-Mandarin speakers are forced anyway to learn a second language, it would make more sense from the viewpoint of those promoting unity if this bilingualism were achieved through Mandarin written in the pinyin alphabet.8 The incentive to learn the national standard, including its pronunciation, would be higher than it is today if one's ability to read depended on it. As it is now, nonstandard speakers work their way through standard texts using whatever pronunciation comes naturally, not fully learning Mandarin and not reading their own languages either."