On my side of the family, 2/3 of the grandchildren (my kids and my sister's kids) are intact -- my four boys versus her two :)
On DH's side of the family, there is only one other grandchild, and he is intact!! (okay, he's two weeks old, but they aren't circ'ing, I'm sure partially because we didn't and I'm a little pushy; plus my BIL really respcects his brother's opinions, so that may have tipped the scales for new nephew). So, 100% of 5 on that side, and I'm pretty sure other BIL and his wife, should they have a son, would also leave him intact (they live in the Bay area, and now have 5 intact nephews ... circ'ing their son would actually put him in a minority in his own extended family and likely amongst his friends, too. Whew!)
Of our circle of friends, almost all are circ'd. I don't know the reasons in every case, but I'd bet big money in the vast, vast majority, it was a desire for baby to "match" dad. Some are Jewish (at least culturally, if not religiously), so I assume their sons are circ'd. We have four other families that we know who have intact sons -- two of which I suspect I may have influenced slightly -- but that's it -- so far, but I haven't discussed this issue with many parents, so it may be more in reality than I assume.
So, our boys are in the minority amongst their friends, but the majority in their family; and I think that, over time, as we branch out into bigger/more diverse schools, they'll be less and less in the minority (our current non-religious private school, which is wonderful, does have a relatively high proportion of families of religions/cultures who circ (versus our city overall), at least right now.)
However, for the record, it wouldn't matter if my four boys were the only intact boys in America, I would *still* have left them intact! The "herd" mentality in parenting, IMHO, defies logic.