Well, I guess that all depends on your upbringing.

I'm from Southern Europe and I'd say it's quite normal for waiters to greet customers like that (except on fancy, expensive places of course). You don't have to "create bonds" with them, it's just a matter of being friendly.

Also, don't forget that waiters in the U.S. live off their tips, so I guess that can be a reason as to why they try to be as friendly as possible.