Since the conversation has veered in this direction, does anyone have a very high needs child (like along the lines of what I described dd as being) who is not gifted? I certainly know gifted kids who are/were not high needs, but haven't met too many little people who are/were like dd#1 was as a little person to know how often that temperment occurs in a child who is not gifted.
In hindsight, I may be an idiot, but I had no idea what was going on with dd other than she was "payback" according my mom, but once we realized that dd was wired somewhat differently mentally, a lot of the craziness we had dealt with in her younger years made a lot more sense and was attributable to sensitive wiring which went along with sensitivity to external stimuli and to overexcitabilities and frustration with her mental, physical, and emotional beings not being in the same place. How's that for a run on sentence?!
Back on topic, though, we didn't see any real improvement in dd in terms of tantrums abating, etc. until she was 4-5 y/o. She was still exceedingly sensitive and had a very hard time with school, peers, and her teacher in first grade in particular. She wasn't peeing on my floor, though, so hey it could be worse!