I agree because...
1. after a while (no matter how good) it will get old/repetitive. i'd rather have a short game that leaves me wanting more than long games that have me wanting an ending.
2. i can always replay the game
3. trophies/achievements add a lot of replay to me
4. online compontents can make a short game last forever if i would want it to
5. i'm pretty time crunched as is -- a game that lasts 40 hours is a game that keeps me from playing another experience (..or two).
6. no matter what they quote as the play time it will always take me much much longer to do a single play though
not that a long game can't be worth it ... but typically i'll be more satisfyied with a short game with really amazing moments like GoW than a long drawn-out experience like darksiders.
