I've suspected this for a while now, and am secretly a little proud, since I have a touch of the evil genius in me. I got confirmation of the evil genius this morning. Ethan was a good sleeper last night, from about 9 PM to 2:15 AM. Then he decided to stay awake and fuss until 5 AM. He'd been fed, changed, burped, changed again, fed again, changed again, fed again, and nothing seemed to soothe him. He finally fell asleep at 5, and woke up again at 7. I was fairly tired still, so at around 8 AM, I tried to put him in the pack and play so that I could nap on the couch for an hour or so. He was asleep when I put him down, I laid down on the couch, and immediately, he started crying. Again, I picked him up, comforted him, he fell back asleep, I laid down on the couch and again, immediate crying. This continued until around 8:45, when I decided to take advantage of Daniel still being home, and got dressed. I came out of the bedroom, Ethan took one look at me, and promptly fell asleep in his pack and play. With no effort. He just wanted to be sure that I was up for the day before he slept.
He also has the fun trick of screaming for a prolonged period of time, then when Daniel calls to check on us, immediately quieting down, so that Daniel thinks I'm crazy when I say the baby's been crying for a long time.
I'm being mentally outwitted by a 5 week old. This is sad.