Do you know Slashdot's system? jhmarten wasn't criticizing community-based moderation, only the simplistic model of up/down voting, when compared to ones which get users to specify why they're voting.
Compared to Reddit as a whole, yes, but that's because Reddit is a collection of disparate subreddits, not a single common area. Slashdot had 5.5 million users in its heyday, which is on the same order of magnitude of the biggest subreddits.
