Just checked on the pearl site, and yes they are 45 degrees. That's on the Export Custom (the new 2007 maple series of exports). I'm fairly certain it's the same on the Visions (birch/basswood).
All other export series have been discontinued I think, so unless you get left-over floor stock from a shop, one of those is what you'll be getting.
If you want more info, I suggest heading over to the pearl forums: http://www.pearldrummersforum.com/ There are many more people who can help out.
