Yeah. Anybody who's tried a DISH DTVpal versus a Zenith converter box *knows* there's a difference in reception. The DTVpal only brings-in about two-thirds as many stations as the Zenith box, and the DTVpal experiences tons of dropouts while the Zenith remains rock-steady.
I've come to the conclusion that "everett whitney" does not know much. He thinks a HDTV will have a better tuner, but the truth is that HDTVs don't have to pass FCC testing, so in reality they are inferior to the Coupon-eligible boxes.