@xouman yeah, sorry for my part, and yeah...
That is a great question. If I dare throw another two cents in here, I actually put way more faith in deck testing rather than stats on the play environment for questions like this. I personally try to use %s of decks played to tune and determine what to play myself, and use testing to determine what is good. But if the question is, will this type of deck still be winning games in a year, rather than will it be widely played...? Then lets test. (One thing I find a little amusing, but to each their own, is watching someone board in a bunch of cards for game 2 against Gush... why aren't they mainboard?... why not play a different deck that can mainboard things that beat Gush... why not play Eldrazi? Hey, I just figured out why so many people played Eldrazi!)
So I am saying, yes... And by yes I mean that so long as Gush is unrestricted, then the suite of Thorn, Cavern, Thalia, Thought-Knot Seer, and less close to the core, Eye of Ugin, Eldrazi Temple, Vryn Wingmare and Reality Smasher... those all seem great. They will win games against decks running Gush.
If Gush is around it is going to keep pushing down numbers of big blue decks, and lesser blue drawing cards like Thirst, and so long as Gush is around, highly aggro taxing decks are going to be around too. (The rebirth of Null Rod aggro will hurt cards like Tezz, Time Vault, Key, and Top anyway.)
We'll see when we print out White Eldrazi on laserjet later today, but I can sure vouch for the Cavern/Thalia/Wingmare part of the equation.