User blog comment:Arbington/What Garrus in ME3 Means.../@comment-743796-20110412000133/@comment-1691295-20110412013907

A majority don't have the DLC. A couple of million copies of the game have been sold. The vast majority of them won't have played the DLC. Hell, only 50% of people who played ME2 even finished it, so that's half the ME2 player base that won't have played the DLC.