As you'd see if you opened the link, pdq, that quote's from the Fort Worth Star-Telegram. I understand that means it's in Texas, where that a survey was carried out, which does seem to indicate that they don't think too highly of Dubya any more.

Not too surprising. They may be tend to be conservative-minded in Texas, but that doesn't have to mean stupid. (Doesn't even have to mean Republican for that matter, as you point out.)