That subcompact frame really does feel small, even though the slide itself is almost as big as a G19 slide. I forget what it's called, but IIRC there's a different grip module that uses the same subcompact magazines but is a little wider (like all the other frame sizes) and feels better in the hand.
On that note, anybody want to trade an RMR-milled 357 compact top end for a 9mm compact or full size top end?