I think I haven't seen such feature, but probably is not bad to have: Basically if you earn some amount of points i.e. 1000 the system could tell you:
you have better ranking than 60% of the users in the system.
For the sake of completeness, note that there is a non-automated way to find your rank at any given time, not just when you cross interesting thresholds.
For an even more precise calculation, note that there are seven rows and five columns, for 35 users per page. It's not that much more work to figure out your exact position.
Of course, by the time you've done all that math, your position will probably have changed.