From the time I signed up to the forum until now, if I take all my posts and divide them between the weeks I have just over 61 posts a week but in some weeks I know I made zero or very little posts so no doubt I must have hit well over 80 posts in weeks.
I am not talking about the quality of the content I posted (or lack of), just the numbers involved
when I saw this list the first thing I thought was to run to see what the position of @figmentofmyass was and he is in the position 747

but if we count all his accounts, the guy could do more than 100 posts a week. this guy is legend
Eh, I average 75 posts on a good week and it's not unusual to see me at 60 posts per week. And there are some people here who can do even more than 75 (I read in his services thread for example that @Ratimov can do over 100 posts a week).
two years ago i was able to do up to 60 post per week ... i think if my memory is not failing i still haven't managed to do 70 a week since i'm here at bitcointalk.
currently I can't post 40 post a week.