This I'm really curious about. Most of my FLAC rips come out to at least 900+.
Lastly, it depends largely on a given track. Was it brickwalled in the studio? How well did you rip it? Was it verified? How good are your ears? There are a myriad of variables at hand beyond what's had here.
I got it right, but I really dislike just that one example that goes up on that site.