So you sold your PS3 because a multiplatform game had too many patches and was taking too long to download?
Did you consider trying a download of Battlefield 3 on your 360 and seeing if it was any faster? I somehow doubt it would be. But if you are ever tempted to pick up a PS3 again, buy some games (exclusives) on disc, and you will be able to start playing immediately and see what a great system it is.