I don't know whether 2600+ players decide that trying to grind down another 2600+ player is unproductive, but I am always impressed when both players try and mix it up. In the following game Sokolov tries a sharp sideline on move, which unfortunately blows up in his face. And bonus points for the game ending with a castling move!
Sakaev,Konstantin (2625) - Sokolov,Ivan (2657) [D17]
Serbian League Kragujevac SRB (5), 05.09.2009
1.d4 d5 2.Nf3 Nf6 3.c4 c6 4.Nc3 dxc4 5.a4 Bf5 6.Ne5 Nbd7 7.Nxc4 Nb6 8.Ne5 Nfd7 9.e4 Nxe5 10.exf5 Ned7 11.a5 Nd5 12.Nxd5 cxd5 13.Qb3 g6 14.Qxd5 gxf5 15.Bb5 a6 16.Ba4 Qc7 (D)
17.Bf4 e6 18.0-0 1-0