I answered NO as well, and personally I think of katatedori as a uke-controlling-(or trying to)nage type movement. Think: restraint. And I don't think of restraint as an attack, per se, but something that can lead to an attack. Which is not katatedori in and of itself.
But I can also agree that it has too do with moving nage's center down, thus imbalancing him. Thus helping the restraint.
My wife frequently has to restrain in the school she works at (special ed) and some of the techniques used are quite different than some of the Aiki ones I've seen thus far, but a good grab on the wrist is worth it's weight in gold.