200 Watch - ETAs for GMS

I don't really understand your way of estimating how long it'll take until they hit 200. I know I'll go for 4-5 days gaining less than 10% a day, then spend another two days grinding more than 4 hours on 2x, and level several times. Not everyone is outputting a steady exp gain like a machine. I'm sure the people that are really close are probably more motivated to finish the job than the ones that are still early 19x, and would be willing to pull extra hours to hit 200.

Also, a column for which class they are would be cool.