What keeps him from leaking dirt from the '90s? Does he have a non-disclosure agreement? Does he feel a professional obligation to hold back? Is he syndicated any more? It seems he just posts short blog entries on his own site. You can tell where he's coming from.
Is he on anyone's payroll this cycle? Are they saving his stuff for a last minute surprise?
When a media release is on a Friday (like last weeks), is it generally considered to amplify the effect or attenuate it?