Are they? I thought the point was that fat/supple tires weren't slower. Perhaps I missed one of those psuedo-scientific studies.

25's here, mainly due to historical re-enactment as a subset of what fits in my frames. I've got 28's on my commuter...can't really detect any difference.

I've got some NOS Veloflex in the 22c sizeway, can't wait to put those bad boys on.