Yup, my house was full of them just a few minutes ago. They've all gone off the park now; the silence is deafening. But it's all good; they're nice kids and they're having fun. Loudly, to be sure: they're teenagers. Were my friends and I that loud? I expect we were. It didn't seem like it at the time, however.
Teenage girls sure do giggle a lot. And I'm loving it.