Maybe 2 leaderboards, one for assists and the other for no assists. But wow, some of the times are really fast, there is a guy/gal that done a 1.16 XXX using no assists. I can only get a late 1.19 XXX with assists on. If people want to challenge for the fastest times I think they will need to invest in a good steering wheel. I don't think the joypad can cut it. Some people say that both joypad and Wheel are the same and that it depends on the user but I seen videos of people playing with wheels and they can really turn into the bends.
When I use the pad I have to lift off the accelarator to take the bends. I know I'm no racing great or anything like that but I've played the entire F1 series from 1995 when it appeared on ps1. I'm not to shabby at F1 games but I see from videos that the wheels offer much better turn in than the pads.
I know people will say that it depends on the car set up but I do set up my car, I can do a 1.13 in Catalunya with my pad but when I seen a video of a guy using a wheel, he was really hammering it in through the corners, much more than I could ever get with my Joypad.
The Leaderboards are fun and I don't take them seriously, its nice to be up high on them but its not really important. The fun factor is more important, and this game is fun, it has bugs but its fun :)