Hi, vmere! Welcome

It's hard to answer your question because people's reactions depend so much on their own experiences and attitudes toward giftedness. It is not unusual to get negative responses, though. I think many people here have experienced that. I think people's reactions have more to do with them than whether or not your child is actually gifted.
I found the preschool years with my DD to be challenging, too, and I thought that
Raising Your Spirited Child was a very useful book. It helped me understand what my DD's behavior might mean and gave me some helpful strategies.