Interesting. And this is for test cricket, right? Just to make sure we're not at crossed wires.Regarding AI RR, I've not found this to be the case at all. At 20, I find the AI score around 3 an over. At 50, they score nearer to 6. Anything over 30 and they try to slog at everything.
This has just been my experience and I realise it might not be the norm. Maybe I just suck at bowling.