Uh-oh! Logic problem!!! BE CAREFUL WITH STATISTICS!
Continental Extreme Contacts have only been on the market since April 2003 - what's with the high snow rating that TireRack's been posting since, oh, August? I asked - they answered - they post what they're given from owners, not seasonally adjusting the data. The sales guy was very quick to point out the logic error, and said that the high snow rating was probably overstated by enthusiastic owners. The tire probably would do well for an all season in the snow (check the open tread pattern and siping) but not as good as a dedicated snow (check treadwear - that's a fairly hard compound for a snow). TireRack was very forthcoming about this - but on the phone. The numbers don't tell the whole story.
Also note - the numerical ratings are NOT comparable between different tire types - the folks buying all-seasons are rating them on their cars, probably never having considered an ultra-performance tire. In that respect, the conti extreme contacts will probably far outperform, say, a Goodyear Arriva or no-name cheapo all-season in the dry, but won't hold a candle to the dedicated summer, soft compound 040. There's a filter on the data, and that is the preselection criteria: People evaluating the Conti Extreme Contact are in the market for an all-season, not an ultra-high-performance tire.
THAT SAID: I'm not bashing Contis, have owned 'em before and would definitely buy them again. The Conti's I've had were great, long-wearing, all-season tires. The Extreme is on my very short list, but I won't be buying for a while after getting new 03.5 wheels with 190-mile 040's on 'em... I've not sampled their performance tires.
Also - careful with logic again - the opposite of "the best of all worlds" is not "the worst of both worlds"... lemme ''splain it to ya:
An all-season will be BETTER than a snow tire on dry or wet pavement - which actually describes the majority of my winter driving, but not the majority of my winter RISK, therefore I ride on snows in winter. Due to a variety of factors, others (be they of lesser skill or greater exposure) will trade off some snow performance for better safety on wet pavement.
...off my soapbox now...