In my experience, the 26/27 prints noticeably less than the 19/23 when carried IWB at 4:00 (but then, the 19/23 is pretty good in that department, too), and draws and shoots (in the case of the 26, anyway) nearly as well. It's a worthy compromise, IMO.
Like I said, though, for me, the 27 is too snappy, but that's how I feel (to a lesser degree) about the 22 and 23.
Complete bullschit.
Takes 15 minutes on the range to demonstrate it and it's not even close.