HEY, I had the SAME problem as you!
I KNEW that it wasn't some IDEA I had one day. How do you fake seeing certain lights, hearing sounds, etc??? Why would a kid apparantly not utter sounds for a while, and then just start talking SENTENCES one day!? Apparantly, my development seemed delayed, but before 2 I was AHEAD! I never asked WHY nobody had me checked out with the delay in speech, but the rest was subjective, and they probably couldn't figure it out.
LATER, with the senses, they thought I was crazy. Never mind that everyone else noticed in the same order that I did later.
As for the reading, etc...? HEY, who worries about THAT? Obsessions? "Better get out more, get some exercise, etc.....!" Bad social development? "OH, HEs only SHY!"!
BTW I'm in the US. We probably wouldn't know about this TODAY if not for the fact someone can get rich off of it.
Steve