You can get a screwdriver-looking thing from Brownells that will get the shells off the moon clips with a quick twist each. I bought one when I got the 940, and I don't know what I would have done without it.
BTW, I shot the 940 a lot this weekend. I can report that the clips from Ranch Products seem to release the spent shells more readily than the S&W clips - they don't seem loose or anything, just better-made.
The 940 is now downright pleasant to shoot, thanks to my polishing and dehorning the trigger, and thanks to the filing I did on the boot grips. A whole lot of that kicking was just because the gun didn't fit my hand perfectly (does now, and points perfect, too - gotta love "custom" grips), and a whole lot of the blistering I initially got on my trigger finger was from the sharply edged factory trigger. (You know S&W, the Centennials are DAO guns . . . do you think the public would want the trigger that was designed for mostly SA shooting, or, maybe, just maybe, we'd want a smooth combat trigger?)