Following on from last Thursday's Grand Theft Auto IV: PS3 vs. Xbox 360 Special, author Rich Leadbetter told Eurogamer that he'd found an even more precise way of measuring average frame-rates and wanted to update you on this. He also thought it would be a good idea to answer a few of the more commonly asked questions about his methodology. The Frame Rate Tests section of the piece has now been tweaked accordingly, and here's Rich's commentary on it: