I just ran the test on my system and the results look almost exactly the same, except the numbers are roughly halved (dual cores vs quads).
My CPU hits 33k on the Dhrystone while the 2.93Ghz dual supposedly gets 23k. Thats an increase of about 33% for only about 20% increase in clock speed (from 2.93 to 3.6).
Very strange results.
Try running your CPU as close to 2.93 as you can. If it still scores much higher than theirs then its most likely just an inconsistency with their scoring. Or you could have an uber system.