This one's interesting, the first Tesco's they went to had slightly more copies shipped to them on PS3 than 360. At the second Tesco most wanted PS3 version too. I was expecting 55/45 split in UK in favour of 360, but it looks like PS3 might actually be able to outsell the 360 version in UK. Still, it's such a small sample that you can't read too much into it.