Instead of saying that the things you heard are untrue, it seems as though you shoudl be saying that your CivPro class has been an exception to the rule.
Yes, there are exceptions, and some professors run their classes differently than the norm.
To say that these two things you heard are untrue because ONE of your 4 or 5 classes isn't run that way seems a bit of a stretch.
Blah, Blah, Blah.
Jacy's right. Exceptions exist, but the general rule is as you heard - memorization gets you the C, analysis gets you the A, participation only makes a difference if you're on the edge, or if your participation was phenomenally good or phenomenally bad, and professors curve. Also, the professors I've talked to have said that the curve doesn't do much anyway. Students distribute themselves along the curve by their performances.