Google is well aware and proud of that fact. They cut their bandwidth in half by not validating. I was playing with jQuery in the dev console in Chrome yesterday on the Google homepage and realized that I was writing valid jQuery, but that $("body") simply didn't exist.
They cut their bandwidth in half by not validating. Care to elaborate on this bullshit about cutting bandwidth in half? I just want to remind you that quoting attributes and leaving out some tags is perfectly valid in HTML5 and HTML4.01. Even in strict. Converting their markup to the valid one would not be difficult, and they could even save some bandwidth. For example: drop those stupid attributes for body tag. drop…
Okay, not half. But cutting down on bandwidth is their own self proclaimed reason for failing so hard at validation.