thank goodness for the worker thing, that drove me nuts ruining some turns when I thought I had a mine up etc( I know, its lazy to screw that up, but still)
I think they mean how the CPU will attack cities, not the frequency, but maybe im wrong about that. I just held off atilla and monty's team up attack of multiple battering rams, archers, warriors...too many to count...in a WIDE open mid map location with zero hills and zero mountains.... because of poor great general management by the cpu(they apparently fixed this now), and because the cpu took too long to actually attack my city. they ended up missing taking it by about 1 turn because of it and I held them off with a joke of a force(warrior, walls of Babylon) better management by the cpu and I lose it as I should. I hope that is more of what they are talking about because the frequency of cpu attacks is enough for me.