JohnKSa's response "I'm not relying on the gun primarily as a talisman." Amen!
My assumption is that in the heat of battle I'm not going to be as effective as I am on the range. I'm going to be shocked and scared. I want enough bullets to get me and my loved ones out of danger. I practice each weekend in hopes that I will minimize the number of innocents I hit behind the bad guy, but make no mistake--he's going down.
Talisman--that says it all. These thin 7 bullet guns are for comfort, not for defense, UNLESS the carrier practices swapping out magazines as well as shooting at targets. Here's how good I want to be if I'm carrying a skinny gun: http://www.youtube.com/watch?v=raGgNe0MgLM