Okay, Daryl, we may need a 'judges' decision' on this one.
No question, InnerCity is the hands down leader in the Length-of-Posts category. Air, on the other hand, is miles ahead in the Number of Posts category (4.38 per day).
It appears we need two awards: Posting Average Actual and Posting Average Adjusted. This division -- where each post is weighted according to its length -- has a precedent. Namely, the PGA TOUR, which has two measurements for Scoring Average (Actual and Adjusted).
Hey, a second trophy doesn't cost that much. I'm for giving both!