Only 34 of his 76 points? That's a pretty huge impact, especially considering they didn't play together the whole season (especially the first few months and on the PP).
How is that a huge impact? Players playing together are going to get points together, that's just logical. But when one player scores more than another and scores over half of their points away from them, it's pretty obvious they're producing fine on their own. According to NaturalStatTrick, Hudler spent 992:49 with Gaudreau and 395:42 without him at all strengths. So a player he played with over 70% of the time had a hand in less than half of his points. That's a huge impact?