Nope I haven't, I'm going on standard PC and Macbook (not pro) touch-pads that I've used. I'd like to try one of the new Apple trackpads out, but don't know anyone that has one.
Next time you’re near an Apple store pop in and have a play. It’s much better than any non-Apple trackpad I’ve used (though I haven’t used many recent PC trackpads to be fair).