I have a 16 month old insomniac

I don't know how Jason functions on so little sleep. Last night as David and I were retiring to bed at about 1am, we walked past the boy's room and Jason was sitting straight up in his crib, babbling away. He continued to talk for the next hour .....and the next hour .....and the next hour. I heard him at 4am still carrying on a one-sided conversation. Unfortunately, I had difficulting sleeping as well, worrying about the fact that my child is a freak. I thought surely he would be difficult to wake up this morning. But he was bright-eyed and bushy-tailed at 7am. I decided this morning I'll attibute the insomnia to what any good great-grandma or grandma would say, "He must be teething," or "He was probably hungry."