Currently, the comment for which I've received the most positive karma by a factor of four is a joke about institutionalized ass-rape. A secondhand joke, effectively a quote with no source cited. Furthermore, the comment had, at best, tangential relevance to the subject of discussion. If anyone were to provide a detailed explanation of why they voted as they did, I predict that I would be appreciative.
Based on this evidence, which priors need to be adjusted? Discuss.
It certainly will not, but do we know whether this will be because of the length, or because RobinZ's post is simply better, or because it was posted sooner?
It is not a well-controlled experiment - but ciphergoth's top-level comment, which is later than prase's, has already gotten more votes than prase's. This would suggest that the delay was not an overwhelmingly strong effect.
(Actually, MrHen's comment likewise, and MrHen's is not short.)