Like others have said, it all depends on the ridge. In this case it is the southern half of the Full Palisade Traverse[1] which is a very technical ridge with long sections of 5th class climbing[2].
One way of looking at is that these guys have been moving 12 +/- hours a day in the mountains for a few months now and they've covered just over 2 miles of the ridge in 10 hours today so it better be pretty hard!