i both agree and disagree with the "boot sized right" thing. especially with the recent trends to make boots lighter and have a smaller footprint on the board, end result, thinning of liners. one company to another and year to year have significant differences in toe box padding.
my recent liking is a boot sized nearly 2 sizes too big with 2 pairs of 2mm neo socks (4 mm total). extra cush, extra warmth (when needed), and the boots release real nice too. down side-bigger boot (not a problem to me)