To me a real wheelie isn't distance.. its having a strong enough motor to get you up. I'm gonna repost your links here just so i can shift/enter d/load the wmvs and take a look..
But all i seen so far with moped wheelies is you gotta hang your ass off the back of the seat so your weight brings the front end up. Maybe someone's got a strong bike and geared low so they can do it with power, but i havent seen it.. but maybe i will in a moment.