I just read that link, and I personally wouldn't buy a bird from them, they seem to be making very large generalizations. And some of the info doesn't seem correct even.
A few examples, they mention which birds have better talking ability then others, they do not mention not all birds, no matter what kind, will not talk at all.
Also they mention that cockatoos are "Velcro birds" This can be correct, but they also go onto say that African greys don't usually care about out of cage time, which horrified me.
I feel like these people DO care, do not get me wrong, there is some good advice, but I think that they may not be as experienced with all kind of birds. I hope no one is offended.
Rachel.