I am can confirm that this is correct on strike rate.

I am currently doing an analysis myself on weights and the impact of them over three years of saturday metro racing, when I finish, I'll post the results here.
It won't be for at least a week as I'm only a quarter way through it and it's very time consuming, but already this pattern seems correct.

E.J. has some great statistics he uses but some of his conclusions leave a lot to be desired given his statements on the Ausrace message system.