> I think close to 1000 is pretty common for breakfast. I used to eat Dunkin Donuts a lot and I would see people order a Bagel with Bacon, Egg and Cheese on it. That is 470 calories. A side of hash browns is another 140. And then top of it off with a donut (350~) and an a large ice coffee (170) and you are over 1000 (I took the calorie # from DD website).

This is not a normal breakfast for anyone except the hyperobese or the hyperathletic. A bagel with bacon, egg, and cheese, plus hashbrowns, plus a donut, plus a sugary coffee? Yes, some people eat that much all the time, and yes, many people will eat that much occasionally. I don't think it's a typical-sized breakfast for most people, though. Most people I know don't even eat breakfast, and when they do, a donut+coffee is more realistic for calorie count.

> Also a single serving of cereal is really small. Until I started using a food scale, I was routinely eating 2 servings of cereal (Multi-grain cheerios) which was about 250 calories.

Yeah, cereal servings are unrealistically small. But still, a realistic serving is more like 250, not 750.