Other than the Start Menu bugginess (still can't figure out what is so damned hard about thousands of programmers creating a decent Start Menu?) this build seems to perform well.
You know, maybe part of it is that TPTB at MS are a little pissy over having to reintrouduce a W7 style Start Button at all and are holding back on development out of spite. I mean think about it, if they turn out a really awesome powerful W7 style Start Button, it makes getting rid of it in W8 look that much dumber. Remember, MS actually did research that showed almost no one even used the W7 Start Button (preposterous). Even in a big company like MS, egos still shade decision making.
This isn't hard. Someone is making it hard.