TG, I am working on a theory about tandem handling and it relates to why some prefer Santana over Co-Motion. I really believe it has to do with background. Recreational riders, tourists, Sunday afternoon cruisers all seem to prefer the Santana bike that steers like the Titanic. Fast club riders, triathletes, former racers may prefer the C0-Motion bike that handles like a personal watercraft.

I haven't thought this completely through yet, just kind of thinking out loud.

But as I and others have said, it only takes a few miles to get used to any of the differences so that they become unnoticeable while you are riding.