I didn' time the acts. I have 2 PT's now. One ranger and one bard/warlock(durge). The first did almost all side quests, for about 155 hrs, the second was a durge run, and skipped a lot of of the quests from act 3 and came to about half that time. (I play on balanced mode, but have switched to explorer on the heaviest fights, and have avoided quite a few fights with RP options in the 2nd PT)
The first run obviously had more restarts in it, so that biases the numbers.
How close act 3 is to the end also depends on what companions you gathered. You would surely want to do their personal quests, but other side quests can be completely omitted, although some of them are fun, while others are less so. So for the first PT, I would try to do as many as possible, and then for the next run you can be more selective.

Last edited by ldo58; 20/12/23 12:36 AM.