That's great when they just fit like that. I had mediums but they would still have needed some customisation on the right hand side anyway.
If you have relatively good roads on your commute the Kojaks will roll very nicely. I prefer the Marathon Racers inflated to full pressure but that's a personal thing. The Kojak is a good tyre. Did you think of changing the brake pads?
Brompton cannot meet production demand for the raw lacquer now. Fastest fulfilment is January 2010 if ordered now. Good luck with your Brompton. Like London it's the perfect bike for steering quickly around obstacles in nYC and folding into an inconspicuous package to take into buildings.