How some large sites use CSS

Top Ten Sites from Alexa

who	doctype	css linked	css in head	styles on body	tables for layout	valid?
Yahoo	strict	No	Yes	No	No	No
Google	none	No	Yes	Yes	No	presume No
YouTube	loose	Yes	Yes	No	No	No
WindowsLive	XHTML transitional	No	Yes	No	Yes	No
Facebook	XHTML strict	Yes	No	No	No	No
MSN	XHTML strict	y, @import	No	No	No	Yes
Myspace	XHTML transitional	Yes	Yes	Yes	No	No
Wikipedia	XHTML transitional	Yes	No	No	No	Yes
Blogger	strict	Yes	No	No	No	No
Yahoo Japan	loose	No	Yes	No	No	No

who	doctype	css linked	css in head	styles on body	tables for layout	valid?
IMDB	loose	Yes	No	Yes	No	No
BBC	XHTML strict	y, @import	Yes	No	No	Yes
CNN	loose	Yes	Yes	No	No	No
ESPN	XHTML transitional	@import	No	No	No	No
eBay	loose	Yes	Yes	No	some	No
Amazon	none	Yes	Yes	Yes	some	presume No