COMPLETELY disagree. They are great for baking *and* frying. The trick with frying: Lower heat - they are rich and have less moisture than a chicken egg - and use something nice and rich such as a little butter or other fat. We have an electric stove, so if I'm cooking it in a pan, I use 4-5 on the stove, let the bottom cook up a little, then put a lid over it and let it steam, often turning the heat off about halfway through. It creates a rich, gooey, delicious egg that is delightful on a piece of toast, accessorized as you wish.
I also take them to work with me and "fry" them in the microwave. I rub a little butter in a bowl, add salt and pepper, crack in the egg, and add a little salt and pepper on the top. Depending on your microwave and how done you want the egg, 50 seconds to 1:20 and you're all set. Add buttered toast and/or other accessories to taste.
For baking, I did my first attempt with them last weekend, used the same number of duck eggs as chicken eggs in the recipe, and ended up with some incredibly rich, delicious pumpkin bread. Yum!