I like to double check stuff but there is a thin line between that and offending someone who has already done it correctly. So did A have any effect or not?
Hmm...I'm not sure how I'm supposed take that?In light of my mistake, I didn't see that my results would be any different to the ones you already had, and therefore, relevant.
Anyway...
Enabling or disabling the lag fix had no effect on CPU usage in windowed or full screen mode.