Yuppers! Thankfully, the tantrums aren't too frequent anymore.
I've seen benefits to the strong willed/stubbornness in my daughter too. She thinks for herself and doesn't submit to peer nonesense. (saw this for myself when she was on cheerleading).
So I will take the circle jerk of the room if she isn't going to let herself be pressured by other kids too.
I hadn't thought about it in that way - maybe I shouldn't be so uptight about the stubborn streak after all.......