Since I started eating paleo I can not stop working. Seriously. I'm doing it 12 hours a day. The recommendation to stop watching computer screens before going to sleep was a difficult one for me.
I haven't touched my iPod for months, haven't played a video game for months, ... I do read books. Personally I think it's all because of stress : I need less relaxing when I don't eat crap. Less relaxation = more work.
I'm a PhD student and I just wrote a 57 page dissertation chapter and a 25 page dissertation prospectus in a month's time - all on Paleo while attending bootcamps twice a week with another high intensity workout to top it off. Energy? Yes! Workaholism? I think I might have had that before. But I have been working non-stop for a long period of time recently and wondering how I am still going....kind of amazing that it might be my diet and exercise. Paleo has changed my life and I love it!
I think that once you get rid of the gluten, the inflammation begins to subside in your body. Hypothalamic inflammation goes down as a result. And because of that your thyroid kicks in, giving you more energy and less brain fog.
I clearly have a lot more energy since I cleaned up my food intake. If there's a payoff for you in applying the additional capacity to your work that can be a happy option. Otherwise, I do more socializing and moving around, etc., and I invest a lot more thought and energy in food preparation. I do more online reading too.