If not why not? Wouldnít that cut down on a lot of spam sites that are cheaply done, surely creating a W3C compliant site is a signal that the owner took the time to craft a properly coded site that renders well across all browsers?
My understanding is that if a site isnít W3C compliant the browser falls back to run the site in quirks mode (good enough) surely this should be taken into consideration on some level by google?
Donít want to offend any non W3C developers here but it was DRUMMED into us back in uni years back so should count for something?
Currently the sites I see ranking against all my clients follow the same pattern
1)NON HTML/CSS compliant
2)Badly fail googles own PageSpeed Insights test BADLY compared to page 2 results
3)THIN content, under 100 words per page
4)No (or very few links 20 ish at most)
5) Keyword clouds keyword ~ keyword ~ keyword
This all makes me think Penguin 2.0 has destroyed every site but the badly done sites that probably sat on page 20 up till the last few weeks/months. These business owners MUST be wondering why the hell their phones are ringing all of a sudden.