naw man. you have it wrong because of this:
"Many people believe that joints waste more weed than other techniques such as pipes and bongs. They base this belief on the observation of a larger stream of smoke emitted by the tip of a joint, whereas the bowl has a small thin one."

The reason I think joints are more wasteful is because they are constantly burning, even when you arent hitting them. at least with me and my friends hitting the bowl until its stopped burning is kinda common sense, sometimes you can't keep hitting it but thats like maybe 1/5 hits. so most of the time there is no smoke wasted with a bowl.