He's not conceding: he's getting dropped. You don't get to over 3k points by conceding. FYI on his screen it shows a victory too - only difference is he gets no pvp points for defeating a lowbie and you get a gazillion for beating the #2 ranked player in the game.
Yes, SidMiester, my games drops more than other players, is a game issue. I posted this problem months ago and you can read it few posts beneath yours, called "PVP game drops". Tsiflikas and other expert players (thank you) and obviously the Three goblins team trying to help me to fix it, but seems a long way to go..