http://hwbot.org/community/submission/929755_touf_hydrofox_pifast_core_2_t6400_2ghz_37.34_sec
The writing in the pifast window is different the all the runs I have seen with pifast. There are spaces in the text, which there shouldnt be when hexus pifast is ran. As seen here,
http://hwbot.org/blog/wp-content/pifast.jpg
Im thinking the run was done without using hexus pifast.
There is no way a stock T6400 is going to run it in 37 seconds. The next one at stock 2Ghz is 10 seconds slower. Mine has nearly a 25% overclock, a fresh install, and higher clocked ram, and is a full 2 seconds slower.
http://hwbot.org/community/submission/999597_cecil_pifast_core_2_t6400_2ghz_39.36_sec