Not sure, hence the question.
I remember going from 512k to 1m, which felt more responsive. The jump from 1 to 2m fealt the same. 2 to 8m fealt more responsive. The jump from 8m to 40m fealt the same but no lag when others using the link at the same time. Was thinking of trying 80m now, but li could be no difference, hence the question.