Groove:
Who said anything about PWM pins?
Who said anything about libraries?Besides, what sort of control signal do you think the Servo library generates?
Let me think...hmm...that's right, it's PWM!
In the context of an Arduino sketch, servos are best controlled via the Servo library and not by generating the PWM yourself. If you aren't talking about Arduino pins and libraries, then what relevance does your answer have to an Arduino sketch?