Quote:4.Nc3 you can go ...Bb4 transposing to Winawer exchange, or play more quietly with a Knight on f6 and bishop on e7.
It amazes me how many low rated players on the internet play the exchange variation - I have some sympathy for the Winawer exchange line, but the standard exchange is not going anywhere - usually castling queenside followed by the good ol kingside attack does the trick. The 4.Nf3 move order as played by Kaspy is more tricky, but again 4..Bg4 or 4..Bd6 are good enough.
Being a former French addict, and a reasonably weak player as well, I can see one benefit of the Exchange Variation for white.
As a French player, it isn't too difficult to end up playing the same pawn structure as black against the Advance, the Tarrasch, the Winawer/Classical/McCutcheon if you really want to. Because of this, your pieces largely end up going to similar squares as well. There are some standard themes across all of these positions as well (c5 break, f6 break, "what the hell do I do about the bad bishop").
As white, if you are up against someone of this mindset, and I was one years ago, 3 exd5 busts the position open, and all of these "standard" plans and placements go out of the window. White plays the game more on his terms.
I'm not saying the Exchange is good here, merely that it has the potential to unsettle those who enjoy playing black from behind their pawn chain.