The above seems like a pretty usual time for Full Autonomy; I've only beaten the full game once so far, and it took 7 hours 58 minutes and 10 seconds to beat completely.
I've heard some people can do the whole thing in four hours; I'm far along in my second playthrough right now, we'll see!
I actually finished my first playthrough in 3 hours and 45 minutes. Think I just got lucky with my strategy, but I guess one's focus should be one always upgrading paperclip production until you start having excess materials, and try to keep a balance so input = output as much as possible. But of course, all of this goes out the window on the last stage of the game.
I've heard some people can do the whole thing in four hours; I'm far along in my second playthrough right now, we'll see!