It seems like my definition of a "short" game is changing drastically the older I get. I just don't have that much time to game anymore... Bioshock lasted me a good year. Heavy Rain lasted me over a month (one play-through), and I played that what I consider "a lot". As a rental, I would have to play it an entire weekend, from the minute I wake up until I go back to sleep. Reality is, if I get like 3-4 hours in on a weekend, it's exceptional.
But as I have said in other contexts, that is great *for you* ... but game length is an objective quantity ... so just because one round of Tiger Woods PGA Golf now takes you a month shouldn't stop those of us who continue to want RPG's to be 40+ hours like back in the 80's ...