Yup, I've been getting, "when are you due?" from about 10 weeks. Then people are all SHOCKED when I tell them we don't do u/s so have no idea if its a boy or girl. "How are people supposed to buy presents for the baby?" all offended like. In my family, since they all know me they just plan to go out and purchase something small if they want after the baby is born, then they stagger their visits to when it's convenient to them for a few minutes over the weeks after the birth. No big deal.
People are so used to seeing pg women who don't get big (probably through dieting while pg) so any pg woman who accepts her pg and EATS automatically gets the "You SURE you're not having twins?" I'm not skinny to begin with, of course I'm gonna get BIG.