Since he mentions ghosts and fuzziness in the pictures it seems apparent he is talking about Analog TV. I am very new to HDTV and don't know a great deal about it but I have yet to see any fuzziness or ghosting on pictures with marginal quality issues.

Twin Lead has lower signal loss than RG 6. My own personal tests bear this out plus I've had two engineers (one broadcast) tell me the same thing. Coax has higher signal loss but is a bit more durable and will outlast Twin Lead. Twin Lead has lower signal loss but needs to be replaced sooner than Coax.

I just did a head to head comparison here in Buffalo with a high quality low loss Twin Lead and RG 6 and as usual, the Twin Lead won the battle for better picture quality on Analog signals.