Though I doubt they wouldn't release it in EU, the players who currently do have access to the game for stress-testing the servers are already getting errors messages. And when the JP version released, we had a full week of errors and maintenance (one even lasting like 16 hours), and there were vastly less people trying to access the game during that time.
It's certainly unfair to the fans in EU/PAL, but if they let all of us loose in the game at the same time, it would probably be unplayable.
That being said, you can easily make NA accounts in iTunes or download the apk so you don't have to wait for an official release.