I have moved from using the slide release to overhanding the slide. I found that, under the slight pressure of a competitive event or qualifying drill in a class, I would occassionally hit the slide release with my strong-side thumb an instant before I'd fully seated a fresh magazine.
The result, obviously, is that the slide would drop on an empty chamber, and I'd get a 'click' instead of a 'bang'. I recognize that this is a sequencing/training issue, but it's not one that shows up in practice. This has only happened a couple times when I was trying to hit a reload at warp speed in a class or in a match.
So, until I can get a solution sorted out, I've gone to overhanding. It is unquestinoably slower, but -at least for me, for now- it's more positive.