Anyone who followed the 1993 NHL playoffs remembers that the Montreal Canadiens had an exceptional record in overtime. The Habs were 10-1 that year in games that went past 60 minutes, and even that one loss tends to get forgotten since it came in the Habs' first playoff game. As a result, the more oft-cited statistic is "Montreal won 10 straight playoff overtime games in 1993".
The journalistic narrative that year was that Patrick Roy singlehandedly won the Cup. Given that Roy didn't score any of Montreal's 10 overtime goals, any reasonable person would have to conclude that there was more to it than that. Roy's contribution was surely significant, but how much of the OT streak was a result of his play, and how much was earned by the shooters in front of him?
The Hockey Summary Project now has the 1993 numbers posted, which means that we now have access to shot data that might help answer that question.
In 11 overtime sessions in 1993 Montreal was outshot 66-59, yet scored 10 goals to their opposition's 1. That's a 16.9% shooting percentage and a .985 save percentage. Needless to say, that is a remarkable run (it is not often you see a PDO number of 1.15, even in a very small sample).
The league average save percentage in overtime in 1993 was .907. Montreal wasn't really affecting that average much since the total save percentage in overtime periods involving the Canadiens was .912, it was just heavily skewed in the Habs' favour.
If they had the league average OT shooting and save percentages Montreal would have been expected to score 5.5 goals and allow 6 in overtime. That means they outperformed their expected goal differential by 9.5 goals, of which 4.5 were the shooters outperforming and 5.0 was the goalie outperforming.
That gives approximately a 50-50 split in total contribution between the goalie and the shooters. Without question St. Patrick was great that spring, but even the best goalies need help if they want to win anything. Contrary to popular myth, Montreal had a very good team in front of him, and the Habs were able to increase their odds by managing to avoid the league's top teams in their playoff bracket. It was still a very heavy dose of good fortune that Montreal was able to be that opportunistic in those high-leverage situations, as without the Canadiens' great record in close games they probably would not have won the Stanley Cup.