Update.

I just thought you all would be interested to know that after yesterday's nap, he refused to go to bed at night. He stayed up 'til 3AM.

And since I couldn't stand to wake him up before 7 to take him to my gym class, I decided to let him sleep and skip my class. So what does he do?

Wakes up and starts screaming 10 minutes after it's too late for us to leave. Great.