Well, the point that methanol lights easier in extreme cold probably IS true- it vaporizes at a lower temperature than does ethanol, and there is a lot of empirical experience on this forum to back that up. I know that some folks here like the S-L-X because the methanol component makes it easier to light in the cold, but the ethanol component holds more BTUs. (Though I have my doubts about the degree of benefit this mix allows.) And, as I've said, I agree that the methanol panic is a bit overblown.
That said, I'd probably just commit and use pure HEET, myself. But I'm rarely out in such severe cold, anyway.
And, on the other hand, I kind of agree with your point that boldly declaring a "very best all around blend" without explanation is useless, if not hubris.