But then what is the alternative?
A standardized test measures "something" in some situation. The snowflake gives us at least an inkling that the tire performs well in that situation (compared to non-snowflake tires).
Infinite conditions exist: Powder, wet pack snow, snow over ice, snow over asphalt, snow with slush, ice, etc. You're absolutely right. for one person (or group of people) to say XXX tires are the best, ignores a lot more variables than a standardized test.
So I do need to ask again: What other objective criteria / methodology is available? I'm getting ready to plop down $1000 on a set of new tires for the up coming winter season and if there are other alternatives, I'd like to hear them.
PS. Just gotta add this. I've spent the last few days poring over reviews and recommendations on soooo many sites. If there's a short answer for "whats the best all terrain tire mix for long highway commutes and high sierra nevada snow" I'd LOVE to hear it.