Here's me doing a 1:10.382 a while ago with racing softs.
Keep in mind this is a really low quality video since it was taken from my livestream channel and ported over in low-res to my Youtube channel automatically. But you can still see, and more importantly hear, what's going on.
<a href="http://www.youtube.com/watch?v=rn2KOZYk5t0">YouTube Link</a>
This was during free run with low fuel and with an engine still not broken in.
I'd imagine the absolute best possible lap only an alien could perform would be near the low 9s and possibly through some sort of possessed lap, a high 8, but it's not too likely. Maybe in a race with a couple quick drafts. Although they'd have to be really touch and go for them to have any sort of advantageous effect in Monaco.
I've gone faster and done 1:09.8xx a couple times and I actually hit a 1:10.8xx on racing hards during qualifying for a spot race so they're not too far behind in potential.
No special set up btw.
A friend of mine named Reventon can do 1:09.7s pretty consistently.
So for someone starting out, realistically, they should aim for 1:13s then work their way down.
Once you hit low 12's I'd say you're a pretty fast dude and should be proud 👍