Semantic Structure - Stay with HTML5, or go back to HTML4 or XHTML?

[seoskunk]

I loved the ideology and developments in HTML5 and the new structure on semantics seemed clearer and more logical. But now I am wondering if I have done the right thing in going html5 for semantic structure. I structure websites based on

<header>
<nav>
<content>
<aside>
<footer>

[by the way I do close the elements :) ]

Within each segment I structure content H1-H6 meaning I often end up with 5 h1 tags.

The sites aren't performing too well should I go back to a HTML4 structure or XHTML ?

[SevenCubed]

I was pouring over HTML5 today trying to warm up to it but from what I can see the browsers aren't in compliance with much of the new useful stuff so I'm holding off for probably another year at least.

[Sgt_Kickaxe]

<!doctype>
<old stuff still, browsers aren't ready for the rest yet>

[Robert Charlton]

Re HTML4 vs XHTML... a discussion from 2006 which, though dated, may still be worth a read...

Why most of us should NOT use XHTML
http://www.webmasterworld.com/forum21/12026.htm [webmasterworld.com]