Hmm... a game between Kantans (who?) and Xiong, played on the internet in rapid time controls is your proof that it's being played by elite GMs in games that matter?
Ok.
I wrote, "Here is a black win with it," and posted the game. Where in that sentence does it say, "proof it's being played by elite GMs?"
Btw, MVL has played a revised Polugaevsky variation occasionally. I think he chooses his opponents carefully before trying that stuff tho.