Platform: PC (Windows 7 64bit)
Version: Bully: Scholarship Edition
In-Game time: 2 hours, 40 minutes, 12 seconds
Real Time: 2 hours, 37 minutes, 39 seconds
New world record by 7 seconds.
I fucked up pretty royally during 'Finding Johnny Vincent', but I still somehow managed to beat my best time.
If I hadn't screwed up during that mission then I would've gotten a better time by 45 - 60 seconds.