I call bullshit on that one.
sorry, but he will net over 1oz per plant without transplanting (if he does everything right) and he only wanted a qp. The thing is though that you'll have to water like daily, and feed often, so just make your life easier and use the biggest that will fit up to 2 gallons.
I would guess 1.5oz per plant if he's using the light right.
The plant with the shitty picture quality and guitar is one of mine, the other is fdd2blk's. No this is not ideal, we're both just screwing around with them, mine is a mother, his is in a 16oz cup for a contest. He probably had to feed every other day at lower levels, if not every day. Mine I basically ignored most of the time and just gave water. That's a miracle grow pre nuted soil grown plant just so you know I didn't do anything tricky or special.