That's what the site author claimed he does. Others claim that what he actually does is just adding a few percentage points to the official stats[1]. Among academic economists, the site author is largely regarded as some kooky conspiracy theorist[2].
Personally I just see him more as small time business man making a nice living from satisfying some market demand for figures that proof government is lying to you. For those who want to find out for themselves, here's the raw BLS data[3] and methodology[4].
