I was deploying via PhoneGap and it was working fine with the iPad cabled into the iMac. No problems.
When I pushed a build to TestFlight, though, it worked fine for everyone but me! It froze up at the splash screen.
Turned out I had to unplug the cable from the iPad and exit out of the version of my app I'd installed via XCode. In fact, blow away the app if it persists. Then, you can install via TestFlight.