Hahaha... Nice statistic. I can explain myself though. I have a desk job and my work is not continuous. I have sometimes hours at a time with nothing to do, but have to be at my desk - can't hop on my bike and take a break. So at work I'm always with one foot in the forum, which explains why I have so many posts.
I'm here to learn, and have learned a lot in the past few months, so I'm always eager to ask questions - truth be told, I don't know much. Then I also feel obligated to help someone else in return, so I don't become the leech of the forum. I'm also faithful to one forum only, so all my posts go in here while others spread themselves across more than one forum.
I do ride 50miles a day to and from work, except on rainy days, and I do a little riding on weekends too. Only had the bike since October. I guess average miles, but a lot of posts.
Combine all of the above and you'll have a very low MPP (Miles Per Post)