I hate this 100 point system, for me IGN and reviews like these should settle with the 5 point, the 10 point or 20 point system.(gamespot is 20 point, eurogamer 10 point and X-play is 5 point for those wondering)
Gamespot is 20 point because the scores range from 0-10 and the minimal significant value is .5, so 10/.5=20 which means there is theoretically 20 different scores that can be awarded.
OT: I don't care much for FF13 and 7 is considered a solid game by some scoring standards, but these scores demonstrates some inconsistence.
The site that I almost always am right about predicting scores is Gamespot, and my prediction for it sits at 8.0