The point is that 'more features' isn't necessarily better[1], so no list of html5 feature support is going to tell you much about how 'good' a browser is.

[1] case in point: the misfeature we are discussing in this thread, which is just another addition to the big list of browser features that I have to go out of my way to disable to get a sane experience that minimises my exposure to the incompetence of web developers