he means write in your natural tone. many people write in a completely different manner than they speak.
I wish he had said this, however. Many people do think that writing requires a windy, pretentious tone, which it doesn't. But I specifically tell students not to write the way they talk for the reasons the GP hits.
it still ignores the point that not everyone has a good natural tone. some people may be never be good verbal presenters, and they'll need to develop a good written tone in the absence of good speaking skills.
I wish he had said this, however. Many people do think that writing requires a windy, pretentious tone, which it doesn't. But I specifically tell students not to write the way they talk for the reasons the GP hits.