Yeah. But it doesn't sound like he was very serious about the estimation, from the "let's say" part. As it's described somewhere, iirc, that Rand channeled as much as a hundred men with Callandor (although I guess that might be an exaggeration). Anyway, Moghedien got ecstatic from the thought of...
It could also be a dream whose reality was changed. Or it could be something that was never intended to be fullfilled yet - it could indicate things that might still happen in the future.