I think there is confusion between okay pulling and bad pulling. In my opinion, any obvious, well-defined pulling is bad. But you might see some variable tautness that an optimist could attribute to "life" in the cloth or tailoring of a jacket. Any pulling at all is a deficiency in fit, though when talking about RTW there is a limit to to just how well anything can fit. If a jacket is not bespoke then a small amount of pulling is probably within an acceptable level of fit; if it is bespoke then in my opinion there should be none. Any jacket is going to pull when the wearer is in some of the positions shown in the images posted in this thread though.