IMO Jack Frost runs are a lot shorter for the most part, no Nile Mile's or anything of the like but your wait in lift lines will be MUCH shorter. I was a JF last Saturday on a holiday weekend and waited no longer than 5 minutes for a lift and that's pushing it. So you get many more runs in with less wait time. It's a trade off.
The JF park has a bit of everything for all skill levels, nothing too intimidating by any means.