the reliability of a centerfire primer is a lot better than a rimfire round also
I'm with FrankenMauser on this one. Good .22lr ammo is just as good as centerfire when it comes to going bang. And before someone starts in about semi's feeding rimless (for the most part) ammo better than rimmed rimfire ammo........ it's not that dang hard to finds rimfire semi's that function pretty much 100% with good ammo it likes.
As for the test....pretty good. Still a little misleading since we have no idea of "damage" diffences between the hard and round .25 fmj vs. the softer, deformed .22lr. While pentration was less it's still possible that the .22lr might be better. We'll never have enough real test to know for sure.