A good quick look or early game LP with commentary will fill that in. The Giant Bomb format has one person asking another a series of questions, and game feel usually comes up. ACG reviews so many games that it's more than likely he covered it in a video. If you find a couple of YouTube channels where the reviewers or LPers have similar tastes as you, it ends up being as good a method as any to make an informed purchase. Demos can also sometimes be misleading, depending on the game. There's no perfect answer here, but there isn't for any other purchase either.