Hey, Scott. Your comments tickled my curiosity. I looked at the Top Reviewers lists in the big queues. In addition to the Stewards Club members, I spotted nine frequent reviewers who had more total reviews than some members of the Stewards Club.

David Postill blows us all away, but became a moderator just shy of reaching Steward on the Reopen queue, and hasn't imposed his will on that queue since.

I summarized what I found in the chart below. The queues are in size order and reviewers are listed roughly by total reviews from the queue summaries. In cases where someone was in the Top Reviewers list, there was an actual count. For queues where someone didn't make the list, I used the bottom cutoff of the queue and presence or absence of the three review badges to determine the range that the count could be in.

So reviewers who weren't in the top group on every queue have a lower and upper range in the chart.

Here's the chart: i.stack.imgur.com/VyStF.png

Interesting discovery.  It looks like the count in the profile (“all actions” → “reviews”) is a true count of the list  of reviews shown in the profile – but that doesn’t include posts that have been deleted (even for us >10K guys).

@Scott, the 15 people in the chart account for 40% of all of the reviews ever done on the site.