It's going like crap. I can't seem to get more than 2 perfect IVs on any one baby. And just a few seconds ago, I did a head bang because I just realized I could save loads of time checking IVs if a I did IV battles not breeding centre leveling up. I just need to figure out how to go about it on a gen V cartridge.
Edit: Btw, I don't know if you know this, but you can't get the same nature/gender egg if you save in front of the Daycare man on Gen 5. Even if he's holding an egg at save time, when you pick it up, it's still random. So the PRNG call is done differently than in gen 4.