While I would like to agree with the article and say it's something else's fault, it's totally my own doing that I stay up late watching TV or playing games. It's not my "biological" clock keeping me up, it's the stimulus I'm getting that's keeping me up, especially with games. I'm sure if I pulled myself from a screen starting at 9pm, I'd be asleep by 10 or 11 instead of 1:30am