I've played for 1hr30min and it says I'm 15% complete.

It that only disk one? Cause, that's only about 8-9hrs of game play. Which is fine, but for 3 disks, I was honestly expecting 12+ at least.
So far it's reminding me more of Mafia 2 than GTA4. Mission, mission, mission, with no chance to just chill and explore without a mission parameter over your head.
Not really complaints... but the driving is REALLY pissing me off.