Seems par for the course. One outlier from someone who w=hates all musou games, and the rest are mostly 7s and 8s, with a few 6s.
The Gamespot review is a little weird. The reviewer complains about the performance (which seems to be praised everywhere else), but never specifies if he was using the quality or the performance mode. That's really important information for consumers he leaves out. And given Gamespot's history (not knowing how to use motion controls in Skyward Sword and not bothering to complete Crash HD collection, to name just a few), I've got wonder if this falls into that pattern and the reviewer didn't know a basic fact about the game.