I think I started a thread a long time ago on a similar topic after I realized I couldn't tap out a beat to Tool.

I'm just at the point in my drumming now that I can play a few entire songs in 4/4. Actually, I can 'mimic' some odd signatures if I'm listening to the song at the time but can't do them on my own for very long before I lose time.

With great power comes Awesome irresponsibility.