I really think it depends on the audience.

I don't filter when sharing with my family, but don't share as much with DH's family since they like to compare.

I usually don't volunteer the information. However, if someone comments about how early DS reads, I usually say something like "he likes to read just like me" and move on.

I do get the "look" when I do flash card with DS in public, even though he loves to do them.