I definitely don't think you're overthinking it either. GT kids are very in tuned to what goes on around them.

Last week I was sitting at a gymnastics class for DD3. 2 mothers were having a conversation in front of a boy I'm guessing to be around my DS's age (1st or 2nd grade). I could not BELIEVE the things they were talking about in front of this boy. My DS would inquisition me and reprimand me for about an hour if I would have had this conversation in front of him. It struck me that perhaps it is a GT thing. I'm not sure I would have had this conversation in front of my 3 year old.

All that sounds encouraging! I hope the good news keeps rolling in.