Continental Drift! Right on topic. So those tires have been studied in detail by the non-cycling world. Is the drift more in wet conditions? Did they measure water thickness? Can you extrapolate the results to other tires? And did they study this drift at speeds relevant to cyclists? (The experience of the tandem rider a couple of post up sure sounds like it could be described as "drift". Were those tires Continentals?)

For now, I'll stick to Vittoria tires.