My wife and I started tandeming in '82 and were self-taught which led, of course, to both of us being unclipped at stops. We ride quite a bit and are almost telepathic when we ride and rarely have problems with anything, whether it be stopping and starting, standing cornering, etc, so I doubt we are going to change now.
So, anyway, we were at the Midwest Tandem Rally a few years ago and were stopped at an intersection when I overheard a stoker tell the captain "Look, Honey, they must be just learning. She's not clipped in." We just glided effortlessly away when the light turned green and I whispered to my wife, "Maybe we'll figure this tandem riding thing out some day."