html5test might not be the best comparison either. They test things that are not part of the official html5 spec. The scoring seems sometimes arbitrary.
On my machine, Chrome Beta channel scores 51% in 52ms and IE TP scores 44% in 41ms. If no browser is even making a passing grade on that test yet, it seems more aspirational than anything.
Suffice to say, if IE11 was that great, they wouldn't be dumping it and rewriting. That's considerable effort.