I agree with you on this. But it has veered off into the realm of political correctness which I totally oppose. Developmentally Disabled, what a dumb term. I actually use it myself. The problem with retard (its history as a word) is that it gives a real picture of a person who has Down's Syndrome and people find that repulsive. I'm being honest here. When I started to work with people who had such problems, I did find it repulsive but once I got to know them, it didn't bother me any longer. I think the word retard conjurs up a disagreeable image to people, so now we are supposed to avoid facing the reality that these people have some severe disabilities and cover it up with developmentally disabled, a euphemism that is the dishonest use of language. I was an English teacher and I used to cover euphemism in my classes. But I do try to be sensitive about the words I use.