Statistical analysis of game sales after large torrent sites are closed?

There must be some industry types around here with the numbers.Industry players are always quick to cite the amount of illegal downloads but I’m thinking that a more accurate statistic to use would be the average sales of games after a major torrent site like The Pirate Bay is shut down. Does anyone know whether any stats agencies are planning anything like this?

I guess uhh… someone will find out when TPB actually goes down?