Well, if an average random access to disk is ~5ms, and an X25 Intel SSD is ~500 microseconds, then we're already talking a 10x difference and that's for a 'consumer grade' SSD. I'm sure the latency will come down over time as well. If you look at some of the PCI-E SSD solutions, then we're dipping below 100 microseconds, which means we're into 50-60x difference.
