As far as I know, it depends on the family and their costumes. I come from a very very rich family, but we were all very relaxed, and our table manners were basically unexisting, if you felt like eating with your hands, eat with your hands. And I'm from France.

Anyway, I respect people who are bitches about this, going all berserk because i picked up a tomato with my hand after opening a bathroom door HOURS AGO. Damn, you guys, there is a reason for which you clean your hands before eating.