Mac Rumors has a roundup of reviews on the new MacPro.
Overall it sounds like people’s complaints were right. The ports on the back are a pain. And the Dual GPU is only good if a program is written for it, and the only one for that now is Final Cut Pro X. It seems currently Premiere Pro uses mostly the CPU, so it is pretty slow as compared to say with CUDA and a GTX 680 or my GTX 670. Be interesting to see what will happen when Adobe makes it compatible with the dual graphics cards though.
Still on the fence. Really want a GTX Titan, which would mean a Windows Machine for my next computer, but there is much software that would not move over and that would not be good. And even with it’s improvements I don’t see myself moving over to FCP X anytime soon.