Matrix: Revolutions is only going to be 2 days late (think that's just because movies open on a Friday here).
The Harry Potter movies came out here at the same time.
We get homegrown movies before you like Bend it Like Beckham, Full Monty, 28 Days Later, etc.
Its got a lot better in the last few years now we usually only need to wait a couple of weeks sometimes less. I remember when it was almost standard that if it was a summer release in the USA it was a Christmas release in the UK, particularly true for PG certificate movies.