Even though he is running SLI, I would say he is fibbing a little and probably had the processor overclocked just a tad. Or maybe it really hit around 13.7 or so, and he figured that was close enough to round up and call it 14. The processor would be straining to drive SLI'd cards at 2.2ghz to get that kind of score. The CPU test part of the benchmark would suffer pretty badly with that processor. I would say 14 is a little on the high side, for all to be running at stock speed but not unrealistic.
Phenom 920 @3ghz
BFG 8800GTS 512 OC
4 gig Crucial DDR2
15,200 3Dmark 06
PS...a pair of 9600GT OC's would be about equal to a single 8800GTS OC, with the 9600's having a very slight edge when you push aa/af towards the higher end of the scale.