This guy runs a test with as weak a wrist as you can get. Glock fails but who would shoot this way? Does this concern you. I've had a few FTF's with several different guns but I never knew whether a limp wrist might have been to blame...or some other issue. I've had a few guns that have never FTF'd. Those are the ones I really trust. If I could make them fail with this test I doubt I'd trust them less.
http://www.youtube.com/watch?v=BsktLC-hzx4
http://www.youtube.com/watch?v=BsktLC-hzx4