Eh, it's RPGfan. Most around here would burn a mediocre WRPG to the ground but a mediocre JRPG gets praised.
No, I think this has more to do with how big a developer/publisher is that the game comes from. This is very similar to the response to FFXIII, a game that isn't really THAT bad but is treated as one of the worst ever made by a lot of people, partially because of how liked the earlier games were. Meanwhile people sneer at Idea Factory/Compile Heart, while you don't usually see any other WRPGs unfairly piled upon that don't deserve it usually.