Extremely, exceptionally rare is the rider who stops splitting lanes when the light changes. 99.99% of them gun it for the open space of the intersection. Sometimes that approaches an 1/8 mile distance.
I am a licensed M/C rider, I've never owned a water pumper, and I think it is a bad idea.
Woo Hoo! I'm exceptional! :sombrero: I commute every day on bike and never, not even once, filter at the lights. I think it is rude. OTOH, I lane split. On my commute if I do not lane split up to about 30 mph, cars think they are in my way and keep moving over. Yes, I see cars almost every day half in the breakdown lane when I'm just sitting back there, waiting for a safe opportunity.