John,
I would be very careful about making generalizations, John. I have a colleague who gives a presentation called, "Of blind mechanics and hemophiliac industrial arts teachers I have known." He says he has really known only one of each, but it was enough to teach him not to make assumptions. I am not suggesting that anyone can do anything "in spite of their disability". I am just suggesting that it is always useful to examine individual goals and individual capabilities ("deaf" does not mean the same thing for everyone who bears the label!!!").
Dr. Jane Jarrow