these are not fair comparisons. you are paying a lot of money on disney property already (hotel, park admissions, souvenirs, etc.) so the food prices can't be compared to, say, Paris breakfast in Vegas (which is still $16 and a FAR superior dining experience to anything Disney has to offer for breakfast).
Seagrapes at Atlantis is absurdly overpriced, but the food is spectacular and they offer meal plans as well, and if you gamble the price is a lot less (same as Vegas).
So to say Disney is a "great deal" compared to these is not accurate. Having said that, I am also going to cut Disney a lot of slack b/c -- again to use the argument above in their favor -- they are providing a heck of a lot more than "just breakfast food" when you eat at a park or resort.