The general consensus seems to be quality over quantity. But the only thing that is displayed in the avatars is the postcount and a set of stars ( which is based on postcount )
If quality is the more valued aspect, perhaps CH should display only the up/down votes in the avatar. Similar to the karma-display some sites currently have.
I generally don't even look at post count. There are times when it catches my eye. Generally, higher post counts are less important to me than lower post counts. I like to keep an eye on those with lower post counts, as that usually indicates newer members.