I can't speak on behalf of the new "M&P" but the Glock 23 has pretty harsh recoil for what it is. This has a lot to do with its atrocious ergonomics. I was surprised by the recoil and muzzle rise of the thing. I can only assume that the new "M&P" handles recoil better as it was actually designed for the human hand. You'd have to try it for yourself to find out.
Smith & Wesson makes very reliable automatics. I wouldn't think that the new "M&P" would be any different. I'd also like to try the new "M&P" soon since it looks pretty interesting.