He points out an interesting correlation. The meter is based on pi---whoopty shit. What's to talk about?
A lot of interesting articles get voted up and then nobody comments on them because there's nothing to say. Sounds like the system works pretty good to me.
As for redditt, looks to me like they're having a hard time understanding it. The comments page is basically scratch work. A preponderance of mathematical symbols isn't an indication of interesting math.
Actually, I only saw one comment that was neither stating or refuting some basic misunderstanding of the article (it helps that the title at reddit claims equality).
It was modded -1 at the time I saw it. I wonder how can you downmod a purely mathematical argument in that context.
As for the smarts of either community, my opinion is that reddit being bigger you get a higher count of interesting comments but a lower signal to noise ratio overall. I don't think this example proves much either way.