For anyone that owns Modern Warfare 2, it’s likely that it might not have left your disk tray since you purchased it. You’ll have either been completing the story and then replaying on Veteran, buddying up to play Spec Ops, engaging in the multiplier or continuously playing through one of the tutorial levels.
You might not agree with that last one, but somebody certainly would. Over on the WePlayCOD Forums, a user by the name of Cannonsimp has screenshot evidence of him beating Infinity Ward’s best time for the tutorial level ‘The Pit’.
Whilst it’s not strictly a tutorial, the exact same level is also included in Spec Ops mode. Cannonsimp has managed to complete the level in 00:22.50 (or 22.5 seconds). That’s a whole tenth of a second faster than IW’s best of 22.6 seconds.
Think you’re better? You’ll find the level in Spec Ops>Alpha>The Pit.
http://www.beefjack.com/blog/360/infinity-ward-beaten-game/
