" My co-founder, Chuck Moyes, discovered a clustering algorithm that identified friend groups in a given social graph. However, the algorithm took an hour to run parallelized across 6 computers. Then Chuck had the clever idea of coding the algorithm on a single GPU. The run time? 0.2 seconds! WHOA."

I do a lot of work with graph clustering algorithms and have done a little with GPUs and I have to say this is, at best, rather unexpected.