We've played the demo (it was on my local gamestop unit at least) and what Japanese reviews I saw in this thread were postive with load times being a problem. Artstyle looks great, interesting gravity mechanics, open world, CATS... whats not to love!
WipEout is the one with load time issues. Gravity Rush's problem seems to come from the difficulty which IIRC both Dengeki and Famitsu mentioned. They also didn't feel using the touch screen to dodge was very good.