Un conseil d'un "spécialiste" pour rendre vos pages plus rapides à charger, cela ne m'étonne même pas qu'il soit un ancien de chez Microsoft :

Tip #2: Don't use XHMTL

This is very controversial. A lot of people will call me crazy, but I see XHTML as a loser technology. It has its benefits, but they are far outweighted by the drawbacks. And the biggest drawback for me is that XHTML makes your page larger. Purists will always build their page on XHTML, but if you are in doubt about using it or not, don't!

Encore un qui a tout compris !