You think something so big, so late, would only push the game back by just one month? I highly doubt it. Forget EU and US - nothing at all, apart from the box art, has been confirmed for those regions. They may still get the game when they originally planned, but we'll never know because we do not know what they had in mind.
I'm not sure why people are going on about worldwide launches in Q3 2010, when the original launch period was March 2010, and the new launch period (according to the press release) is April 2010... If EU and US do get it in Q3, it won't be along with Japan.