While we knew these were being tested in a few locations, it looks like the 1/3lb designer burgers were a hit. If you didn't see, here is a posting from today's Parks Blog that shows off all the different angus burgers you can get in the parks.
http://disneyparks.disney.go.com/blog/2011/01/designers-burgers-are-a-hit/
http://disneyparks.disney.go.com/blog/2011/01/designers-burgers-are-a-hit/