Ride Report: I rode 13 miles to work today on just about every type of surface, and I must say the ride is awesome! I used the Speedcity wheelset with 700x28 Gatorskins on the rear and 700x25 4 Seasons on the front, both at max inflation. Compared to the aluminum MTB with a Surly steel fork I was riding, all the harshness is gone. The frame has exceeded my expectations.
I rode on the C&O Canal Towpath which is dirt and rocks, paved MUP with lots of root ridges, streets, wooden boardwalk-style bridges and even crossed railroad tracks, and the Troll handled it all exceptionally well. Handling was also very good, as was climbing out of the saddle.
I don't know if the improvement in ride quality is due entirely to steel, but the geometry of my old frame is nearly identical, so that's all I can think of.
Thanks for all of the nice comments from everyone.