7 July 2006 | PlayOn authors archive
Our long-term sampling allowed us to look at trends over a long period of time. In the current analysis, we looked at data over a 6-month span.
In that 6-month period, the percentage of level 60 characters has more than doubled (from around 10% to around 24%). That comes out to about an additional 2% of level 60 characters every month.

But it was interesting that even as the level composition of the game space changed in that time, the average grouping ratio was fairly stable. This implies that level composition has a minimal effect on grouping behavior. The sudden slide and drop at the end of the graph is due to an in-game API change. Blizzard suddenly stopped making the “grouped” variable public in early 2006.

Server Sample: RP (High), PvE (High), PvP (High)
Sampling Period: July 2005 – January 2006
Sampling Resolution: ~12 minutes
Parsing Method: The sample unit is each unique character in each 2 week period.
Data Filter: Characters above level 1 and who spent less than 95% of their time in a main city.
Sample Size: ~100k characters in each 2 week period
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