I agree this is a great thread. Lots of real world pros and cons to help guys decide if they want to try it out or not. Listening/reading to only one persons opinion on it and then making a decision probably isn't the best way to decide.
One of these seasons I'm going to try a twist throttle. Theoretically it seems it won't be as effective as the flippers but I guess you just won't know until you try it. I'm thinking that maybe the throttle tube wouldn't get iced up since it's a relatively larger surface that is constantly turning/moving and if you put the hand warmer element on the throttle tube that should prevent it from icing up as well... maybe?!?! What I think you'd want to do is seal off the cable housing so no moisture could get into that part.
Someone should try it and report back