I think it has to do with how people fry it. They don't have as much water as chicken eggs, so if overdone, can come out rubbery.I disagree VERY strongly about duck eggs being "horrible for frying"... they are WONDERFUL for frying! As long as my Muscovies are laying ( currently 6 to 9 eggs every day) I will not touch a chicken egg. Duck eggs have a richer flavor than chicken eggs. GREAT hard boiled, great for baking, make terriffic quiche and omelets, and absolutely delicious as fried egg sandwiches!! I love duck eggs, and I have always disliked chicken eggs. Now, my local Krogers sometimes has a coupon for free eggs ( chicken), so we keep the carton and feed the chicken eggs to the dog.