^I think it has more to do with how long you have slept before you wake up. As if I sleep only 4 hours and then wake up at say, 6:30 and have breakfast I can feel a bit nauseous, yet if I have like 8hours of sleep I usually never do.
I usually eat the three-main meals, if I wake up before noon or so (a bit flexible with the time). If I wake up later I might as well have lunch first, as in a proper meal right after I wake up and skip breakfast (which is usually only müesli or some bread anyway). Usually those times are after I've gone out the night before, so a substantial meal is more attractive option to start the day than some breakfast food.