Lemme tell you one thing. That's not fast, that's lame. For a game which has an estimated 7 hour playthrough, five and a half hours isn't just short, it's like a 9 minute movie. And I did it all alone too. Seriously, the game business has hit rock bottom with storylines.
Ah well, I gained four achievements in return for this short-term shortie-short-ultra-short expirience. Completed Campaign on Heroic(125), We're in for some Chop(5), Ranger(10) and Cavalier(10). Seriously, that storyline felt like an 30 minute war.
The only mission I had trouble with was Cortana, those things kept nailing me from'a distance. Can't wait for some real storyline, when Mass Effect comes in.