I need to eat around 3000 calories per day to support my powerlifting training, and if I don't eat something first thing in the morning with a shitload of carbs -- usually something like rolled oats, berries, and a few bananas -- then I'm usually gassed and feeling like crap by 10. A few friends of mine fast intermittently and train in the morning before eating but it's beyond me how that is not just pure torture.
then there are the 'early birds' who get up at 5 am and have a 4 egg omelet before the meet. they disgust me :)