This thread is a giant example of what happens when your conclusion comes before your evidence.
Dubnyk plays slightly below average on a famously bad Edmonton team, and it's used as evidence he sucks.
Dubnyk plays great on a good Minnesota team, and it's evidence that he's getting carried by the team.
So basically, the only way to be considered good is to be great on a terrible team. Weirdly enough, none of the other goalies named like Price, Rask, Quick, Holtby, etc., were ever on a team as bad as the Oilers, and some of them, like Quick, haven't really played behind a bad defense ever.
So basically, people decided Dubnyk was bad 5 years ago, and no matter what happens they'll never change their minds. Sad.
I wouldn't say it's impossible to change minds, just that it's harder to do it when a player has a long history of being average, and especially when his numbers were average again just last season. Plus, goalies are more prone to outlier seasons.