Are your DDs/DSs finding like minded peers in their 4th/5th grades? How are your gifted kids finding similar interests at these grade levels? What are the girls into at this age level?
One nice thing about DD's 4th grade teacher is that she seems to be ability-grouping kids, which usually results in DD being paired with one particular girl, and the two of them are getting along. I'd say that 4th is starting off better socially than 3rd did.
But it's still hard to find kids who want to sit and quietly work math problems at recess. (One of the solutions we came up with for DD's recess woes was to give her a pocket-sized packet of long division problems, and a pencil stub, so that when she chooses to sit recess out, she has something to do.)
My girl is into BOYS-ARE-ANNOYING, Rick Riordan books, skimpy tops, flip-flops, hair-and-nails, and designing her own dresses out of two enormous scarves. Also, refining her plans for personal hovercraft, playing hide-and-seek in Jumpstart with her cousin (assisted by Skype), and learning how to do a jump dive from the low board.