superchunk on 15 May 2008
Hardware is really spot on. Big games are really done well. For hardware it's easy to look at the latest quarterly release and compare that to the same time period in VGC and you will always get a difference that seems reasonable for the difference between shipped and sold. Same with big games, like GTA4.
Everything else is a much more "take with a grain of salt" type of thing. I'm sure they are close, but definitely not as accurate as hardware totals. Really, this is just because it is so difficult tracking and properly creating good trends for these lower games.
