User blog comment:Arbington/DLC Theories/@comment-1691295-20100913114012/@comment-1691295-20100914051427

Sorry, I didn't mean to imply that they said they thought people hadn't finished it. I'm just commenting about how well the DLC fits in with certain assumptions. If you assume a lot of people hadn't beaten it, Kasumi makes more sense. Being a squadmate it's clear she's intended to be taken into the suicide mission. In the video I'm referencing Hudson did say they knew that people finished it and part of the purpose of Kasumi was for those people to do a new playthrough.

Think of it this way, if Kasumi was released now, would it make any sense? No. Not anymore. If Lair of the Shadow Broker were released back then would it make any sense? Sure, for us, but not for a lot of people. Better safe than sorry.

Also, you're on the Mass Effect wiki, not everyone is going to finish the game anywhere near as quickly as us.