I for one,don't see speed as being more,if I need more gun I go bigger,same with my rifles...
I have a .38,the next step up for me is a .44 special.I have a 30/06,my next rifle is .338...
If I had a .357 Sig,I would be looking for a conversion kit.My LGS keeps maybe 10 boxes of Sig on the shelf,vs. 40 or 50 cases of .40,plus a 100K of 9mm in the back

Come on America,
Athletes and actors are not heroes, only soldiers, airmen,marines and sailors get that respect�and let's add firemen and LEO's