This is by far the easiest way to get Perfect / Flawless Pokemon with exactly the IVs you need without spending all day trying to breed one out!!!!
Apparently some Japanese players discovered that the IVs of the egg in the breeding center are determined BEFORE the parents are even deposited in the Day-Care. Sounds pretty crazy, but it seems to work! (This would explain some of the glitches I was having during my egg breeding).