Yes, I ordered 2 Titan X's from NVidia last Friday afternoon and received them Wednesday. I am definitely happy with NVidia's service. Haven't had much time to play with them but so far so good.
Well, I can't say the same. If you look at my sig, it really doesn't get much better than that and I can definitely see a difference in my frames if I force the CPU vs the GPU for PhysX. You might be surprised the difference it makes if you had a dedicated PhysX card for a game like Borderlands 2.
There is a very noticable difference in visual effects in Borderlands 2 with PhysX on High vs Low. Take a look.
http://www.youtube.com/watch?v=HdWJLJyE9rw
The current game with the best PhysX is Borderlands 2. Try using your CPU vs GPU on that game and you will clearly see a difference in performance and visual quality.