Sounds like the boys almost enjoyed themselves! Are they sulking at all in order to get extra cuddles and treats, if not they've missed a trick!
It's strange how being in a cattery affects different cats. Tiggy's brother, Benji, was the most affectionate, brave, people loving cat ever made but when he was in the cattery he would hide at the back and hiss. Tiggy has always been the shyer of the two but she became a little flirt at the cattery!