Just letting you know they will just send you an American Version back. My friends Pal broke and he sent it in and they sent him an American back. But an Alternative is to buy a Pal console on ebay. I got mine for $65 just the console.
In response to how I leveled up so quickly. It took 26 hours from 30 to 35 in real time I dont know how long it actually took. In the Jp version there really is no picking a gametype the only options are Players choice, Wingman, and Horde. It sucks because my favorite gametype is Wingman but nobody plays it so I have not been able to find a single match for Wingman yet.