We don't - mainly because a decent amount of people wait to the end of our main announcement to make a selection, and the extra few seconds spent telling rotary people to wait isn't worth it. There just aren't that many rotary users anymore that call us. Plus, the system will kick them to an agent if they don't make a selection.
Although I agree with the statement "All Men Are Created Equal" I think rotary phone users are less equal than everyone else.