Pre-season results mean nothing; though as a fan I'd rather watch my team win a pre-season game than watch them lose.
If you combine our records for '06, '07, and now '08, the Cats have won 6 pre-season games, and 7 regular season games. When real wins are so few and far between, it's easy to get excited about exhibition wins.
I think most teams use the first pre-season game as a way of evaluating their rookies, and the second mostly as a way of getting the starters ready for the season. They'll still use that game to make decisions, but generally they already have a pretty good idea who's going to make the team and who isn't.
Back when the pre-season was 4 games long, it got rather boring, but the regular season started and you knew you had the best players and they were ready. No team had to take the first three or four weeks to "gel".