Yes, so far the girls are inseparable. We are making sure that they go away for boarding at Tads together next month while we are on vacation, and again next yr for 3 months while whelping. Reentry is something that we want to avoid. The boys are extreamly laid back about it when we go away without them, but you know how girls can hold a grudge if one is perceived as getting something the other does not:)
Tris are my favorite, when we are ready for our next generation in 8-10 yrs, I'm hoping it will be a tri descent of one of our girls.