I don't buy that one bit. There are only a couple hundred thousand preorders in NA. EU will obviously have way more, but no where near enough to justify 7 million for launch. IMO, GT5 will be one of the lowest selling GT games to date, selling only 7-8 million lifetime (and I use the word "only" very lightly here obviously!).
It's just a vague feeling I have. I can't really support it with tons of evidence or anything and I'm no where near confident enough to bet on that, so don't ask 
EDIT: After reading people's posts it seems this may be shipments for months to a full years' worth of sales so in that case I find it a very reasonable amount.







