I thought the Acid3 test score of 95 for IE 9 might be a good index for seeing how well it supports HTML5 and CSS3, but then later found out that Acid3's Wiki has little mentioning of HTML5 and CSS3: http://en.wikipedia.org/wiki/Acid3
Is Acid3 score a good indicator for HTML5 and CSS3 support? If not, is there a score that gives a good index for them?