As far as this "astute blogger" is concerned, I get very limited snippets of local ratings.
Even if I got every single bit, there's no way I could do more than just throw some darts at a wall and see what it means. Ratings can be sliced, diced and pureed six ways to Sunday (or in this case, Monday morning), and that analysis could mean exactly squat.
It's one reason I very rarely do any ratings posts as OMW policy.
I also don't have more than very general, spotty information on billing (usually tips like "that station's billing has dropped through the floor in the past few months"), so I don't really go after that, either. As noted, this information is generally guarded with close to Fort Knox-style security.
What's left? General observations, predictions, extrapolation of industry and local trends, and speculation, generally.
I make this rather clear, and have been in the current format change cycle at 106.5...and repeat often that I Could Be Wrong.