>Also in VS2010, waiting for XAML finishing loading makes me totally nuts at times...

I notice that when the Xaml designer first loads. After that it doesn't seem to be a problem.
But I think Craig is right - that should improve in 2012 - I think because they made more stuff async.

>
>Plus a slowdown created by ReSharper and StyleCop, even though both are wonderful tools. VFP environment is much more responsive due to its relative simplicity.

Relatively fast == relatively simple == relatively limited (g,d&r)