16 weeks is still very much a baby. If the puppy was kept by the breeder as a show prospect, then I would assume that he's been handled and worked with, so that's a plus. As far as bonding with you goes, I don't see that as an issue. I got a puppy at 8 months old one time, that had been held back by the breeder. He came to my house and didn't even skip a beat.
~ Diane in Okla
Carly ~ AKC Champion, GCh pointed, HIC
Sage ~ AKC Ch. pointed (13 pts - chasing that last major), HIC
Russell ~ the big boy
Mimi & Pi ~ the meezers