My main has about 13.5m exp in Strength. I also have a 99 str pure with roughly the same amount of experience. I coulden't imagine being one of those guys that go get 200mil exp in a skill, that's insane.
I think I am currently at around 10M total STR from 2 months of botting on a pure I made to tool around on. That is currently my best. I used to have 99 WC on an account a guy from Scion gave me but he recovered it after I got 99 :/