ok, gotcha
Put this way, I get what you're saying and that does make sense on its face. OTOH, there are lots of other reasons for wanting small, concealable guns. One of the other variables that's changed is the increasing number of women carrying concealed, and in general we tend to find mostly (how's that for qualifiers?) that smaller ones are easier for us to hide on our persons. Becuase of how we're built, hanging a full size semiauto in an OWB on our hips (or, for that matter, IWB) doesn't work very well. But my Kimber does a pretty good "disappearing act" in an IWB holster much better than my XD.
Don't mean to be devil's advocate, it's just that there's more than one thing that's been going on at that same time that could also account, at least in part, for the shift.
Springmom