I ran across this article Why I Don’t Believe in the New Atheism this morning. I have joined Wikipedia as an editor, and was reading the article on "New Atheism " after becoming part of the WikiProject Atheism, and the article was cited.
Anyway, Tom Flynn argues that there's nothing 'new' about "new atheism" other than the fact that major publishers are printing it. I'm not entirely certain I agree, but he does have a point. Much of the pertinent information published as "new atheism" is the same as "old atheism" but a different audience has been exposed to it. Personally, if new atheism is defined as being somewhat in-your-face and unapologetically vocal, and showing no deference to religious beliefs as somehow above criticism because of the supposed need for "tolerance", then I've been a new atheist for around 35 years.