"[Her] diet of cocaine and unprotected sex with complete strangers this summer made her tanner and skinnier than anyone I've ever seen. " ~~ A.A.

Not a real genius

You are not a "borderline genius." Your child is not "borderline gifted." "Borderline diabetic"? You ain't eat right, as they say in the vernacular. Real geniuses, and most other people for that matter, know that people only claim to be "borderline [oh, pick one]" because if a putative almost-something claimed to be a full-blown something, everyone would refer to her not as a borderline something, but as an actual stupid idiot.

My child is quite tall, perhaps even abnormally tall. Even so, I do not refer to her as a "borderline giant." The boundaries of giantism, I'm sure, are marked by specific criteria created by some arbitrary authority on giants. So too for geniuses, diabetics, and gifted children. As to the latter, I'm sure the authority is not the program administrator for the gifted and talented program at your kid's school in chicken farm, Iowa, population 483, who said that your kid was "this close" to making the cut. Why do you breathe?