Tokingfool, i think your misunderstanding Vapefiend. He's saying that the THC in Vapor doesn't enter your body through your lungs as easily as the THC in Smoke. So he's saying you should hold it in your lungs longer so more THC will enter your body instead of holding it for a second and exhaling. He didn't ever say it wasn't more efficient.... you still inhale a lot more THC Vaporizing than smoking.