Valve has released a bunch of stats they have collected from Team Fortress 2 this week, ranging from Average Assists per Hour for the classes to the round winning percentages on the different stock maps.
Some of the stats that I thought were interesting are:
Read more/rating_on.png "1 vote, average: 5.00 out of 5")
/rating_half.png "2 votes, average: 4.50 out of 5")
(4.50 out of 5)