I always thought perfect game meant no one safely reached first. I guess you could say "faced the minimum without allowing a hit or walk, but that isn't as clean. The guy that reached was immediately thrown out trying to steal second base, so Means did face the minimum.
This is the first non-perfect game where no runners reached on a HBP, Walk, or error.
The dropped 3rd strike rule is dumb. Many people will come here to defend it because it's tradition. But traditions can still be dumb. And this one is.