In a comment elsewhere, I tossed out the idea of a graph of game-to-game (individual game) SV% of all goalies just to show how the distribution was quite similar; i.e. to paraphrase holidaypark: your goalie will vary and they all vary in a pretty similar a way. I had a few minutes, so I put this together from a 23 goalie spreadsheet (2013 season). I think it's helpful in showing how challenging it is to really demonstrate that one goalie is "more consistent" over the course of 1/2 of a season.
I'll try to give this some more attention before the season starts.