Yes. Out of my last 10 game purchases, only 1 (Killer 7) has been PAL version. New release games are approximately 10 - 20% cheaper online. ($A80 -> $A100) Same goes for DS ($55 -> $70). Importing is essential in both dollar terms and timeliness, Australia still doesn't have Meteos.
AFAIK the only games we've ever received around the same time (or berfore) the US have been DK Jungle Beat and Zelda: Minish Cap. Metroid Prime 2 was noteable for a one - month conversion. This occurred because they basically left the game in NTSC format, in that you needed a 60hz compatible tv.