From what I've read Ged wanted to balance out the stage. Alex has that huge string of Hughes & Kettner amps and cabients. Have you checked out those amp heads? AWESOME! I saw the R30 tour in St.Louis, when the stage is dark all you see is those amp heads glowing in that cool blue. Ged wanted to even out his side of the stage so he added the dryers. On the R30 tour he also had a revolving carousel vending machine. A couple of buds of mine also saw the vapor trails tour and reported that Ged through out t-shirts from the dryers to the audience.
Mark