I was concealing a 1911 with mag well or a g22 behind the hip, under a polo (rarely wear t shirts), and I knew plenty of guys doing the same. I had a 1.1 draw to be accurate, but was working on getting it lower, and knew guys with faster draws. I never switched to aiwb for concealment or speed, and am disappointed that the market thinks of it as fast.
Speed is the least of the benefits of aiwb.