AJAX Myth - I love it.............

I'm listening to someone talk about Live.com.  He had a slide that said something along the lines of

AJAX Myth - Sprinkling AJAX on a site does not make it faster or the site to scale better.

Scaling a web applicaation has everything to do with finding the bottlenecks and eliminating them, not magically adding features based on them being cool.  Who would have thunk that this statement would come from an author of an AJAX book.