We haven't been, but we were told by one of our school district's G&T staff teachers that her daughter had attended residential SIG camp during middle school and that she came back home very energized by the friendships she'd made. I don't think she was impressed with the coursework (she didn't really even mention it), just that in her opinion her dd having the chance to spend the week (or whatever time frame it was) with intellectual peers at that particular age was really really beneficial - for her dd - and that the friendships she made endured because they were able to come back home to their wildly different locations and keep in touch via email/skype/etc.
Also note that this was a district G&T teacher, who's dd was in our district's G&T program. It took all my best effort to restrain from asking her "Oh, so your dd didn't find intellectual peers in our district's G&T program? What's up with that?" Sorry, I clearly have issues with our district - lol!
polarbear
