I agree about cherry picking but I would not call them full of shit. The reason being that every product when being developed starts with a limited set of features and then goes on to start new features once the old ones are complete. May be they are at the point where they have implemented everything they are testing but not other stuff hence no tests for them.

Note that they never say that they are most standard compliant browser. They specify the tests they are running and the % of them being passed.

Disclaimer: I know I might get down-voted for this but I work at MS(not in the IE team though :) ). Of course, my opinions are my own and not my employer's.