The thing I adore about climbing in a trike is, you can just stop half-way up, slam on the parking brake, catch your breath, then carry on. Besides, if it DID, your arms would move forward along with the rest of your body, so no harm done. BUT, I can't find a satisfactory way to mount the computer itself. The only really viable place for it to be is on the control stick, but there aren't really any suitable surfaces. I still climb slower with the Trice.
Weight is everything in climbing, and trikes are generally heavier than bikes.
I have tried every way possible to get my Trice up hills faster than my bike, and I can't do it. The recumbent position is also just not superior for climbing. My upright bike is considerably heavier than my recumbent bike, but I still climb faster on my heavy upright. Recumbents are just not climbing machines, but are very rewarding downhill and on the flat. While I agree that highspeed downhilling in a trike is an unparalleled thrill, the demoninator is time, not distance.