If you think 70% was a bad score, get a load of this:
http://ps3.kombo.com/article.php?artid=11740
^^ I'd take that with a huge pinch of salt, though some of his points have been echoed by others.
The reviews (both good and bad) so far have been all over the place, and I sense shenanigans. Famitsu gave it 39/40 and Dengeki scored it 120 out of 100. Famitsu I just don't trust full stop (they say FF12 was the best in the series) and Dengeki... 120/100? Better than perfect? Come on now.
I think "As if you could play this for 100 hours! I could put up with 8" shows that the reviewer didn't exactly play very much of the game.