Thanks for that artfizz, I'll have a look.
I think one point some people are missing is that going up in ranking is not a linear process but exponential. Going from 700 to 1150 is MUCH easier than going from 1150 to 1600 and MUCH MUCH MUCH easier than going from 1600 to 2050.
I think you mean it's logarithmic, not exponential.

Is it a crime to be curious about something that doesn't concern you personally. I know there are a lot of people who are only curious about things that have to do with themselves, but I'm not one of them. Besides, I DO spend two or three hours a day doing Chess Mentor, and TT.