Where I commute all intersections are sensor controlled. The Left turn sensors never detects my bicycle when I'm moving.

What this means if if I stop at the end behind more than about 5 cars the gap between me and the car in front is too big and the left turn light changes before I can enter the intersection. (For most of my lefts, the signal is very very unforgiving and short.) So I filter to the front if more than 4 or 5 cars are present, if fewer I'll wait in line.