All they said was that the smoke from a joint had a lower tar:THC ratio than the smoke from the bongs. It's up to you to decide if you'd rather deal with some side-stream smoke, or a higher tar:THC ratio.

Personally, I don't think it matters much. I chose joints because if they are well-rolled, the amount lost is minimal, and I don't like having big fat paraphernalia to deal with.