The top arena teams of Season 4 have been eagerly awaiting the arrival of their rewards since the launch of patch 3.0.2, but things haven't turned out quite right. The Customer Service forum is full of reports of titles not being handed out correctly, and an ongoing Blizzard investigation into the matter. A little digging of our own (and a firsthand account from our Rogue guru Chase Christian) confirms that there's a problem, but obviously we don't know the cause.
In a lot of cases, the top (the tippy-top, the #1) team in a bracket is receiving the title of Duelist, when they should be getting Brutal Gladiator and their Netherdrake pets. Players with a rating of 2100 or higher are earning only the Challenger title in some cases, and I think it's very, very safe to say that those players would be in a bracket higher than just the top 35%. Season 4 is not exactly known for having a glut of people nearing the 2200 needed for shoulders.