The Montreal Canadiens have been a flat out bad possession team for the last two seasons. Their 47.6% share of shot attempts at even strength over that time ranks 25th in the entire league, better than only Edmonton, Calgary, Colorado, Toronto, and Buffalo.
Given that information, the fact that the Canadiens have a 51.6% possession rate (shot attempts) through eight playoff games, against two very strong possession teams down the stretch in the Ottawa Senators and Tampa Bay Lightning, is impressive.
The problem is that the way the Canadiens are playing is essentially the exact same as the regular season, they're just slightly more aggressive, executing plays at a higher success rate, with certain players putting up incredible individual performances (specifically Torrey Mitchell and Lars Eller).