I seem to recall Ted Hausotter saying on several occasions that the effects of temperature on hops was overstated.I've heard Bamforth say that keeping hops cold is more important than keeping them sealed.
I don't doubt there is some truth in both. But I'd rather be OCD and keep them vacuum sealed and frozen. It would seem, between the two, that being vacuum sealed might be more critical than absolutely frozen. But I think the results we all have speak for themselves, though - properly handled hops are good 2+ years later.