To be fair, Barkov was pacing at 94, and they had 3 other players at ~70 pts (including a D). That wasn't a low scoring team where he was on an island by himself, he had more scoring support there than in Cgy the year before, where only two other players had more than 55 pts.
It was still a very good season by him, but I can see why GCK might have thought of it as an outlier.
As for Brady, he's led the team 4 out of 7 seasons, something Matt's only done twice in his 9 year career. I don't think Brady is as good offensively as Matt, but the gap is narrowing.