North America would probably be the wisest choice for sony. The playstation brand is still enough to entice european customers. North American success will likely depend on word of mouth. A holiday release will obviously result in bigger than normal sales, and those people are the ones who will be showing it off to their friends enticing them to buy it. Basically the sony brand is weakest in north america compared to its competition so the NGP needs to open with a bang there or it will likely suffer horrible sales throughout the noneholiday months, while sony is currently neck and neck with nintendo in Japan and Europe so the ngp should sell well there regardless.
Either way I won't be getting it unless the bigger titles comeout and they live up to their hype.
