Do they have any historic credibility? I've read Novak's columns before but this is the first time I've seen his name associated with a detailed survey.
They've certainly got a good record at predicting the primaries this year. The only one that I've seen them get wrong so far was the TN-01 primary where they predicted Venable over Davis, the actual winner by a few hundred votes.
Otherwise, this is also the first time for me that I've seen Novak's name attached to a race-by-race survey. His more general record is well-known, including his close-to-the-mark 1994 predictions.