We pulled the fifth wheel across the Taylor Highway in September 2010, a couple of days after it re-opened due to construction that was required because the highway washed away.
We've been across it twice since then, in 2011 (fifth wheel) and 2012 (truck & camper).
Have never considered it dangerous. We like to take 2-3 days for the trip though so aren't in any hurry. We often pull over to let others go by. The only incident we had was when a Class A parked in the middle of the road about a mile into the Alaska side and he wouldn't move or talk to us. So we pulled the fifth wheel around him by going down into the ditch and carried on into Yukon. He should have taken a break at the Davis Dome Wayside, which was just a few hundred yards west of his stop.
Regardless, my page with pictures shows the conditions of the Taylor Highway (before the paving this year near the border).
http://yukonsights.ca/TaylorHwy.html