I'm not 100% sure but I think the MVP is chosen based on wins. I heard someone in the press room say that if Johnny won his last match he would have gotten MVP (would have given him a perfect record) and if he lost then it went to Hatch. I love Johnny, but I wanted Hatch to win it, he really added something to the team that brought out the fight in the rest of the players.
I'm not exactly sure myself how the MVP is picked. But last year in Malta Ralf was perfect. Mika lost a doubles match (paired with Mark Gray), but still won the MVP-award. I thought that was a bit strange, because I assumed the number of wins would determine the MVP as well.
Still, for Mika it was a great way to get that monkey off his back when he didn't get out back in '06 to win the Cup for the Euros. So I guess there's other factors considered in choosing the MVP.
Congrats to Team USA and Shane for a flawless match under immense pressure.