yeah I guess that was my problem, I didn't feel like playing a 50 minute game.
haha, if you want short games, then find or design a build order that focuses on lots of early pressure. If you hit them at say the 5-6 min mark before they can set up their defense, you'll improve your chances of avoidng a long game.
That said, if they're set on turtling, you need to know when to back out. It's hard to break a turtling terran early on... not enough firepower. In that case, again expand & get more production power than he has. Contain him in his base as long as possible. You can fight & lose numerically but as long as you're replenishing faster than he can, you'll win.
edit: i should add taht in my experience, 50min 1v1 games are rare. I think both players need to be of reasonably high caliber (or perhaps reasonably low caliber) to make this happen, since neither side can gain too much of an advantage for a pretty damn long time. In these kinds of 'choke them to death slowly' games, I usually win or lose (i.e., they break out & i can't defend it) within 20-25 min tops.