Ok, so I've been playing Vanilla Civ IV until I got the complete edition. Played about 4-5 games on Vanilla before I got BtS with the Complete Edition. Anyways, so I'm playing BtS and I really notice one thing. To me, it seems Marathon on BtS is QUICK. Like really fast. I played a game and got to the 1000 A.D. years and was like, 'man, it feels like on Vanilla I'd still be around 300-400 A.D.' Am I wrong or did they make Marathon quicker in the expansions compared to Vanilla?