I did some reading over the web and found out a couple of things. Here's an updated list of all DD EX titles on R1:
http://www.hometheaterforum.com/htforum/showthread.php?threadid=19190If the DVD is DD-EX in region 1, it'll be the same for all region. It's because it cost money to redo the entire audio just to take out the EX, it doesn't make sense to do that. If the theatre version is DD-EX, chances are the DVD version will be DD EX as well. As firewired said, all films that were released in 2000 are DD-EX. So if you have the Yamaha RX-V450, switch to PLIIX and turn on EX all the time even if the box didn't say it supports DD-EX.
I don't think I can say the same for DTS-ES. DTS-ES on R1 doesn't necessarily make it to R3, lalo na if we're talking about those bargain DVD5 version. DTS takes a lot of disc space.