18% of Consumers Can't Tell HD From SD

An anonymous reader writes "Thinking about upgrading to an HDTV this holiday season? The prices might be great, but some people won't be appreciating the technology as much as everyone else. A report by Leichtman Research Group is claiming that 18% of consumers who are watching standard definition channels on a HDTV think that the feed is in hi-def." (Here's the original story at PC World.)