Had my US yesterday, so at 11 weeks. Baby was very active! My daughter was active the whole time too. Baby was measuring almost exactly to date (a day ahead, not much difference). I'm so excited about the next US in four weeks (22nd July), we will try to see the sex of the baby!!
Great to hear evrything went well. Can't see the pics though :-( It's still early to worry plus don't forget twins are often a little smaller, that can be quite normal.
My US is next Friday so 11 wk 1 day, then four weeks later and we hope baby co-operates and we can tell if it's a he or a she :-)