You don't think it's reasonable for a team to take 3 or 4 games to settle in with a change of goalkeeper from one they've had almost continuously for three and a half years? I'm not sure Dunk would have chested the ball back to Sanchez back in December, for instance.Maybe. Sanchez being put in goal has certainly helped but he was brought in four games(i think) before the Wolves game. I don't remember there being such a dramatic improvement from his first game.
He was playing in the game against Wolves where all of our failings were evident. There was such a dramatic difference between the first half and second half and performances in general thereafter that I can't put it down to the fact that Sanchez was in goal. I think he has done really well and has given us a solid platform to build on but I think our upturn is based on more than that.
Relevant question might be, how many of our clean sheets have occurred in the second half of the season compared to the first?