Also during last Friday's range trip, I finally got a chance to shoot a S&W Shield. I was very excited when it came out, and thought it might be a great carry gun for me... but sadly it has the same issue as Sigs do for me. The slide stop is directly where my thumb rests, and the slide locked back on empty exactly zero times. It could be argued that since I have to carry a Sig at work, that I should train more to get over it, but I don't think that's the best answer.
I guess back to my original thought of just getting an M&P9c, or possibly track down an LC9s to fondle.