These articles drive me crazy when they don't mention the testing process. Yes, he is using a "server class" machine, but did he disable the features on a hardware level that would skew the test. Answer: probably. I'll assume he did some sort of clear to makes sure that the data wasn't cached on the hard drive or assume that all the reads were in memory. I can't even tell if he ran the test over several iterations.
It isn't that I am doubting the results, but without some trail on how to get the results I can't make this useful information. For example if I were architecting a system and was using this as information I have no idea if I run this in a VM that I need enough memory to get these results.