Shear number of edits isn't the most enlightening statistic. I'm willing to bet that the most active majority is editing articles for style and not content. For example, these are probably the guys tagging "citation needed".
There are editors and there are experts. These are not the same people. And quantity of edits is not quality of edits.
There are editors and there are experts. These are not the same people. And quantity of edits is not quality of edits.