i dont really see the logic in using a relatively small set of game 7's to determine your bet. especially when they didnt involve the teams currently playing.
But here's what we do know - the strategy for winning a game 7 will not change. The players may change, but I guarantee you both coaches are preaching the same thing right now:
Take few chances on defense, and by few, I mean zero. Defensemen do not go forward, let the forwards score the goals.
Forwards, throw the puck at the net as often as you can and hope you get a break. You can't turn the puck over if you don't pass a whole lot, so lets see if we get a lucky bounce. More important is that you come back and play defense. Think of it as playing in OT for 3 periods.
Don't give the refs any reason to blow the whistle on you unless it prevents a goal scoring opportunity. There will be very few penalties taken, and even fewer called. The players will play conservative and the officials will let the game play out as they don't want to decide the outcome.
All of this will make for very tight hockey and fans of neither team can only hope for a third period like we had in game six. Fans of either squad can hope for a blowout but should expect a mistake free hockey game that's close with 10 minutes to go.