I did some messing around with the cable today and read through some USB 3.0 info, short version for my setup (as I use extension repeater cables) my cables might be faulty. I plugged the kinect directly into the pc without the ext.cable and was getting 30fps on both the Kinect Verifier and the Driver4VR.
Also sometimes USB 3.0 cables can get temperamental if theyre are over 3m long, so out of curiosity Ive order a 5m long AtoB cable for the kinect (again due to my personal setup) so I wont need the extension.
As for the Kinect not powering properly cpkelley, mine did the same but turned out the power wires werent attached properly to the motherboard, but this solution depends if you went modded or have a Microsoft adaptor.