I feel that the Oath Rods do cause the ageless look, but that just plain channeling causes the slowing. This is why only Aes Sedai are ageless, and everyone else that we run into for women channelers just look young. True, the members of the Kin don't look very young, but when one takes into consideration that they are between 400 to 600 years old (some of them anyway), they do seem to have slowed. Also, when Egwene stared into the mirror during her test, she could have been commenting that at that point she hadn't held the Oath Rod. The vision is obviously set in the future, so its not unrealistic to think she might yet take the Oaths. Further more, a few of the women that we see taking Oaths that talk about the experience talk about a tightening of their skin all over. Could this be a permanent face lift that causes the slowing to turn to an ageless look? I think so...
wotmania says: I am starting to think this might be the way things are... I do not know about that facelift thing, but the rest I totally agree with.
Theory is wrong