Since, in my opinion, the users of a website determine it's success; most of the things you mention seem irrelevant or otherwise disputable. Do you have any proof to back up your claims that DIV based pages are better indexed by search engines or increasingly cashed as compared to table based layouts?

And usability and accessibility, come on! How is a DIV based page more accessible (what do you mean by this anyway?) or more usable then a tabled layout from the users point of view?