I recently watched Quiz Show since first seeing it about 9 years ago. Still a good movie, but what's possible now (that wasn't really possible in 1995) is a huge amount of available information on the internet.

I dug up a great set of videos, transcripts, and other stuff at PBS' website ("The Quiz Show Scandal"). Not only does much of the information support the factual nature of the movie Quiz Show, but there's also a lot of other interesting information there, too. For instance, Dr. Joyce Brothers gained her fame as a contestant on The $64,000 Challenge, one of the many rigged quiz shows in the 1950's (although she is noted as being one of the few contestants who did not willingly participate in the organized fraud).