How long did it take you to finish your first playthrough?

I've only played act 00 and 01, but that took me around 5 hours of playtime, as in actual time spent playing rather than the registered time on the ingame clock. I expect part of this is because I was learning the mechanics and reloaded a bit, but a significant portion was also listening to codec conversations and playing with immersion: slowly advancing through the world and trying to figure out the best way to deal with a situation. I expect that if you don't use the codec and just run-n-slash it'd be a lot faster, but playing like that and then calling it an extremely short game doesn't really seem fair to me.