Long time? Not so bad... I've done like 30gb in say 20 min, and an hour for 100gb. So at least there is a path that works that isn't hard to execute.
Agree with you about latest C1 - its my Raw processor of choice, but boy, they are doing their best to dumb it down. Too bad, as it was a really clean "industrial" type of processor, that made so much sense... although its catalog was never its strong point. LR seems to do well enough with the Aperture files converted so far.