I'm of the opinion that it's not so much that a system dictates how something is being played, although it does contribute. After all without a system for social rewards/combat no one will bother statting up social skills as it would be handled out of game if at all. Take for example Exalted, which rewards players for coming up with off-the-wall descriptions of actions (Stunting). It's clearly a bribe system for getting the players to think of the game in terms of a movie and what would look cool, but it keeps combat from devolving into "I hit him" being replaced with "We fight atop the wheel as it rolls through the jungle. Occassionally I stumble as I try to reach for the pendant" -Pirates of the Caribbean 2).
On the other hand players have certain tendencies and will follow those regardless of game, which is why even in Spycraft, my characters tend to be two-fisted through the door types. So, I'll vote with the cop-outish "It depends".
On a sidenote, I detest the idea of a Monte Cook WoD, but that's mainly because I fail to see how the themes could be captured in a level based system (Don't we have CoCD20? already), and because some players in my player pool who hated white wolf because "It's too emo" are all of a sudden jazzed about it because "Hey it's D20!" Of course that's a separate issue of one side willing to try the other's favorite game (and enjoying it) but the other not returning the favor so I might be biased.