I'm fascinated with this whole Lehrer affair, not sure why.
I think the problem with Lehrer and esp. his last book is that what he had to say was not very interesting, novel, or enlightening, EVEN with the help of fabricated quotes to backup his claims. That is, if the quotes/anecdotes had been true, it would not have been a better book.
There was a fantastic (very critical and negative) article about this book that came out before the scandal; the scandal obscured those issues. (Can't remember the author or website but will try to look it up later!)
This article pointed out that the whole thesis of Lehrer (and his many predecessors and followers in the self-help department) is circular: it simply tries to define success as, well, success.
What's more, I believe people who are outraged with Lehrer "lies" are a little delusional.
There isn't a world of difference between picking and choosing (true) anecdotes in support of a specific thesis, and outright making them up.
Actual honesty would be to report all facts (which may be impossible) and pay special attention to those who may contradict what you are trying to say (the scientific approach).
But in the land of Gladwell there are no liars.