The last speed run I did, with a few new choices here and there, without mini games, took about an hour.
But with the screens skimming by so fast, I’m lucky I didn’t have an epileptic fit.
It’s not really worth the effort though, unless you’re doing it to build a bunch of saves for future episodes, I mean if you’re not playing the game for enjoyment, why play it al all.
I replayed the game heaps of times when I found it, around episode 5, but now I mainly just reload from significant save games. Worst case I’ll just change a variable or two (I’m looking at you Cathy

).