A while ago, there was a lot of rumors about the "VietRussian" account on PokerStars. Posters on 2+2 said that the account was breaking around even for years, at the mid stakes, and then suddenly moved up to the highest stakes.
People were speculating if an already established High Stakes player had started using someone else's account instead of his own. Who knows? It's possible that "VietRussian" simply got sick and tired of playing mid stakes and had enough money to move up drastically in stakes.
There is a thread with a Poll about this in 2+2 that's over 200 posts long, but it seems to be a dead end.
The location for the "VietRussian" account is Canada. Canadians plays poker too, but we wouldn't rule out the possibility of another American, that moved over the boarder for a life in Online Poker Exile. We wouldn't rule out many other nationalities either, since Canada is great country to be in.
While playing on PokerStars "VietRussian" plays mostly PLO, but he (or she) has been involved in the 2-7 Triple Draw action as well.