A pair of 3v3 teams from the US Bloodlust Battlegroup -- aka BG9 and reputed to be the best US Battlegroup -- recently hit the 3000 rating, the hard cap for Arena ratings. A few other teams following closely behind at 2953 and 2949, making it likely that they, too, will hit 3000 before Season 6 is over. This has caused a bit of a stir in the Arena community, although it's not entirely unexpected considering all the changes that had been made to the Arena system since the launch of Wrath of the Lich King. In fact, some had predicted that this season would see teams hit 3k legitimately (unscrupulous win-traders have hit the ceiling before).
The two teams, big furious joke and sup fresh our turn baby, an RLS (Rogue, Warlock, Shaman) and a RetPR (Retribution Paladin, Priest, Rogue) respectively, are composed of members who have performed consistently well through different Arena seasons. The Rogue of big furious joke, Nutzz, is rumored to be the legendary Neilyo, who grew to infamy with his popular series of PvP videos. Its Shaman, Douja, formerly played pro for Team Pandemic. The other team's Paladin, Euneek, topped his Battlegroup last season using the Holyplay (Ret Pally, Priest, Shaman) comp. None of these guys are slouches and aren't likely to have win traded the way teams in the past have in order to reach the hard cap.
Their recent achievement has brought the current Arena system under scrutiny, as Blizzard has stated before that they never intended for players to reach the rating ceiling. Considering the system has undergone numerous changes in the past few seasons, it's not unreasonable to think that it's due for another overhaul. Regardless of the system, a 3k rating is an incredible achievement. Congratulations on jobs well done.
[Thanks to cigarillo for the heads up!]