I'm switching back to 2.1 as well. I just can't deal with the compromises you need to make just to have froyo. I switched back to calkulin's 2.1 rom, which is the fastest room I've used so far.
I've tried a couple of different 2. 2 roms including calkulin's, but none have felt faster than 2.1. Benchmark-wise, froyo is a lot faster, but during real world usage, I feel that froyo is not ready yet. Our devs still need more time with it
