Uh, I have access to GDB, Valgrind, and DTrace through Emacs (either through GUD or a separate mode). The integration is seamless enough for me, and if it wasn't, I could spend an hour writing an Emacs Lisp extension to fix it. This is classic FUD.
That's real nice for you, but what VS does is bring it out-of-the-box to everyone. Way to miss the point.
In no other creative or engineering profession is there this expectation that the most advanced tools are shrink wrapped together. Who gives a shit if you can buy paint together with your brushes? Just buy the best damn paint and brushes you can find, regardless of who sells them.
But my point stands: if you do want the fully-integrated IDE experience, VS is state-of-the-art, there's nothing like it on any other platform. That is why I don't say "better" or "worse" I say "not comparable".