Umm. Have any of you actually played Boogie to disagree?
IMO, if I was playing a rhythmn game that had off-tempo beats, and your motions weren't in sync with the song, I would give it the same score - imagine Guitar Hero where the notes were absolutely nowhere correctly in place with the tracks.
It's very simple: EA failed at this, and IGN, just like many others, are punishing them critically for it.
Back from the dead, I'm afraid.