It's counting all posts Mark, not just the past month.
Here's the SQL command that's used:
Code
select t1.USER_DISPLAY_NAME,count(*) as total
from ubbt_POSTS as t2,
ubbt_USERS as t1
where length(t2.POST_BODY) < 15
and t1.USER_ID = t2.USER_ID
group by t2.USER_ID
having total > 5
order by total desc
limit 11