Amazing!
For a reference, here's the Japan openings
Diamond/Pearl: 1646K - total sales = 5.92M
Ruby/Sapphire: 1273K - total sales = 5.38M
Fire Red/Leaf Green: 1092K - total sales = 3.15M
Platinum: 993K - total sales = 2.5M (and counting, should end at 3M ish)
Emerald: 747K - total = 2.06M
Going by that, the GBA and DS major Pokemon's seem to have sold 3-4 times of their openings. If it is true that this game has in fact had a shorter first week, that means that the 3-4 times of 1.5M is rather likely.
4.5M in Japan is a definite possibility.







