One of the reasons on the daVinci for not routinely putting both feet down is the inability of the stoker to rotate one of my pedals in the "start" position. Its just so much easier to leave one foot clipped in rather than rotate the pedal to 0600, clip in, rotate pedal to 1000, start. Some lights are short and if you're in the middle of a large group stopped at a light you don't want to hold things up. When we stop I leave my left foot clipped in at 0600; if for some reason the bike starts to lean in that direction I can get that foot out in a millisecond.