Thomas seems to think that there is a myth to that effect.
Having written a 300 odd page book on mobile web 2.0, I don’t think that mobile web 2.0 = mobile ajax.
web 2.0 is an emotive topic. Hence, we(Tony Fish and I) discuss mobile web 2.0 with great detail (i.e. it would have been easier to piggyback on a buzz word).
Here is an old blog indicating the three characteristics of mobile web 2.0 which give an insight to my thinking
Perhaps Thomas is just being nice and trying to help me sell more books
Meanwhile, I am off to speak at the (gulp) Ajax world conference in Santa Clara. If you are attending it, I look forward to meeting you