Hmm can't really help with the two questions but I'm sure somebody here can. Interestingly enough our sons have the same scores, at least for FSIQ, DS other numbers were PIQ 140 and VIQ 127.

I did expect DS scores to be higher based on having him at a solid level 3 on Deborah Ruf's estimate of level of giftedness but he is young and it's only a number so we will see what happens in a couple years. If you have not read that book I strongly recommend it.