Hi Kate!
Funny you should mention 96.9 WRRK, because I was just going to post that today while I was listening, the DJ (Judge) came on and said, "We're getting some calls from folks wanting to know what the instrumental we played earlier was. That's actually Fleetwood Mac's original version of 'Oh Well'...." (They usually play the Rockets' 1979 cover version.)
Then he went on to explain that the first part of the song has the lyrics (he even sang a bit of them!), and then he said, "and the next six minutes or so is instrumental."
He added that it's a great tune, and he's glad people were showing interest in it!
And you're right, Kate... Pittsburgh stations are pretty good to Fleetwood Mac fans, and especially if you're a Stevie fan.