I'm glad to hear that other parents here have children who drive them crazy with endless questions, incessant talking and constant moving -- and not because you guys are all exhausted like me, but just so I know that I am not alone!
Sometimes I do not know how DD5's jaw muscles are not completely worn out by the end of the day. She talks non-stop and her mind is going full blast all the time. I admit that I turn on TV programs just to get her to slow down for a bit so that I can get my sanity back.
Thankfully, DD-almost-3 is more laid back, however she can talk just as much as her bigger sister. At this point, Big Sis tends to monopolize the talking time and playing, but once she goes to school full-time next year and DD-almost-3 is home alone with me all day, I'm afraid I may go completely insane with the incessant talking again. Yikes!

I guess some people would say we were hothouse parents with DD5 who pretty much demanded that we go over letters and numbers and writing with her when she was a toddler. She really did demand it and it was the only way to make her content -- she used to make me write her name out over and over and over again while she studied me intently. I don't talk about her with hardly anyone here in the "real world" where I live because nobody really gets it. DD5 is high-energy -- especially mentally. I just say, lovingly, that she's crazy because that's how I feel about all of this most days. The darn child wears me out!

DD-almost-3 is a bit more stealthy when it comes to learning. She doesn't demand the constant "teaching moments" like DD5 did at that age, but DD-almost-3 seems to pick up on things all the same without the repetition. I'm not sure what that means in terms of her LOG. I don't think she fits well in the Ruf levels because she seems to hold back -- but she's pretty young yet, so I'm hoping once she enters pre-K next year for a couple of afternoons a week that she'll start come into her own more (out of her big sister's shadow, which is pretty big despite her petite size).
Do you think it's safe to say that a child that requires full-grade acceleration is at least HG?