Kryptonite lock v. dremel
Two cutoff disks and 10 minutes later, here's the lock. OK, not quite: it was about 10 minutes of work, but the dremel was heating up quite a bit. So it was more like 5 minutes of dremeling, a 20 minute break, and 5 more minutes of dremel.
My dremel technique was a little off: I caught the disk a few times, and I started the cut in an sub-optimal location. I'm fairly certain that with some practice, I couold probably cut a lock in under five minutes total.