You are correct about proper use. Most people I know ruin their teflon pans with nonstick sprays long before the coating ever wears off. As much as dislike the French, they produce some fine cast iron and copper pans.
What? Non-stick sprays ruin non-stick pans? Never heard of that. Of course, the only use I have for Pam is on the gas grill outside - creates impressive fireballs when sprayed on an operating gas grill!