Update; yesterday the club put a number of seats up for sale that were not previously available. There are currently 25 to choose from. All single seats, so no pairs. Who knows whether these will sell and if they do whether there will be further batches released. I think the answer to the question in the thread title may be no. The exchange may not open until too late (or not at all) against Man City when to all intents and purposes it was sold out three weeks prior. If that happens then what is the point of the exchange ?
I'm pretty sure it's open now and that's where [MENTION=1276]AZ Gull[/MENTION]'s tickets came from.
The only way to test that is to put a ticket up for sale and see if it shows as available. I don't want to risk one of my tickets being grabbed by someone before I can withdraw it from sale, so I'm not going to take that test.