No doubt, I think we have been spoiled by years of good goaltending, the core of which was Karl G.
Why do fans rip Jake? Well, there have been times he looked very good and times he hasn't looked real good. The long and short of it is he makes some great saves but he also leaves a lot of pucks hanging out in front of him. Kollar did the same thing, and got away with it until his last year. Early in the season we were getting wins but still giving up 2-3 goals on 14-15 shots per game. That gets hard to accept when you look at a long season. Fortunately, that has improved.
Maybe us fans are overly critical and expect too much. That said it does look like he is stepping it up as of late. In the WCHA Jake has worked his saves % up to .908, second only to Bruckler and Reichsmuth at .923. Not bad, really. And saves percentage is the one stat that probably isn't tilted by the number of shots per game.