Fellow THR Forum member Sturmgewehre also ran a few limp wrist tests and got a different result.
His videos and a discussion here, or TFL was the reason I was trying it out.
Holding the 1911 sideways as he did in his videos, firmly depresses the grip safety. If you hold the gun in a more realistic manner, but with a weak grip, I think youre going to find you're more apt to have some problems.
I didnt have near as much trouble as he did with the Glock. I only had failures when holding it sideways, and even then, I only had a 1 in 3 or 4 and sometimes more, failure rate. Holding it more realistically, it fired and cycled every time. Ejection wasnt as brisk, but the gun still worked.
I was a little surprised with the Commander's performance though, but the more I thought about it, the more it made/makes sense. The lighter your grip, the more it puts pressure at the top of the grip safety, which tends to bring it out at the bottom, disengaging it.
Youre best bet with any of them, if youre planning on trusting your life with them, is to try things out for yourself and see how things go. If you can get them to fail in practice, you'll at least know ahead of time what to expect, and be able to correct some things ahead of time, or deal with things if things go wrong.