I find track standing easier on my road bike as well. Maybe its because I have been riding road bikes for over twenty years and have only been riding track for a few years. I do it because it is key to getting a jump on traffic when the light goes green.

There are certain lights in town that I will not track stand at because I know they have a long cycle to go through before I get a green again. But then even here in Kansas people are pretty impressed sometimes when you can sit there at a red light and never put a foot down.