This may be neither here nor there, but where I bike there are the occasional bike lanes, but they are not marked through intersections. Instead they fade out before the intersection (yeah, brilliant, I know...) In that situation I will fairly often move to the front of the line, passing stopped cars on the right (NOT moving cars, which is a whole other ball game), position myself visibly in front, and then "sprint my tail off" as mentioned when the light changes. That way I'm seen, and safely across and in the bike lane before car traffic catches up to me.