Most of the time, not. "Politeness" and "political correctness" have very little to do with one another. Calling someone "a person with disabilities" instead of "a cripple" doesn't mean you treat them any nicer or do things that actually help them.
Perhaps PC wasn't the most accurate phrase to use in my post, but if you can think of another, go for it.
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It is all 33girl's fault. ~DrPhil