Infinity Ward is flying a few glitchers out to their studio to find glitches. And we all know there are probably a shit ton of them seeing as a large chunk of the studio left for Respawn Entrainment which forced Activision to bring in Sledgehammer Games to help get MW3 out for its annual November release.
This whole having glitchers test out the game isn't new for the studio. They have had the same group of guys come out and rip through MW2, but it was only for a few days. But this time they are getting a whole week to find the glitches. This is very good news because only a few days with MW2 didn't help at all. That game was completely fucking broken and at times unbearable to play at all from all the glitchers.