Wow that's interesting. I personally feel that anything non toxic in moderation is fine. Craziest thing my parrot has ate is when she stole some of my ravioli out of my bowl. Probably not something to give them regularly but she liked it and seems healthy lol.
I have made grits and scrambled eggs and shared with Mina my U2. Mine do have some milk in them. She also loves cream of wheat and will grab the bowl away from me anyway she can. She even try's to sweet talk me by saying I love you over and over till I give in. So I give her some. So far she's ok. My vet lets her cockatoo have coffee! I almost fell over when she told me.