12.000.000 is a very large number
But it is still the number of peers The Piratebay had sometime during the past week.A peer is defined in the bittorrent world as one who connects to download/upload some part of a file.
The number 12.000.000 is also about twice the amount of people living in Denmark at the moment. Just think about what that means for a second. It means that a website to share information has twice as many people using it as a small country has inhabitants.
For me, it signifies how large a movement this really is, and how much of a failure that any and all actions taken by the RIAA and the MPAA so far has been. They have failed to stifle the further usage of filesharing technologies, and this will probably still be a loosing battle for them in the foreseable future as well.