Probably the 'X' bothers him; it's always seemed silly to me to emphasize 'XML' when the most interesting uses of AJAX skip XML for raw HTML and JS, and the APIs for doing background requests only mention XML as a historic accident (like the misspelling of 'referrer' in HTTP).

It's just a matter of taste, but I prefer a vaguely evocative name like 'Scatter' to a faux-precise-acronym like 'AJAX'.