"I don't think they understand radio." -- Bob Edwards tells all! The former NPR "Morning Edition" host dishes to the Globe: the real story behind his unexpected departure, his switch to XM satellite radio, and his view that NPR has lost its "playfulness" and is now "the New York Times of the air." Yet another reason not to pledge in the neverending fund drive -- if they have enough sponsorship to give away a Land Rover, they don't need my $25. Hmph.