Just to clear up any confusion... the smoke flavour doesn't stop until you pull it off the Q. Smoke flavour is a product of AD-sorption... meaning the particules adhere to the surface of the meat.
The chemical process that produces "smoke ring" is said to stop at around 140F, but that isn't any indication of flavour.
As for foil... to each their own. My wife likes soft ribs, so I foil hers. If I'm doing a High Heat brisket, it's the only way to go. Saying you wouldn't use it because "it's not real BBQ" is like saying you only use your hands to remove hot meat because tongs are cheating!! haha