Pretty much. It can be tricky to pull off the way hair flows when you bob up and down in a way that looks natural. Usually when doing something like that I'll stick the follow through animation in another symbol and offset that a few frames from the main tween to give the impression that it's following after the tween rather than go with it (think of like how a flag works when you wave it.)
I use the classic tween (ie. the only tween CS3 has) using a custom ease btw. I don't even want to try and understand how CS4+ 'motion tweens' are supposed to work.