I'm not sure if I can wrap my mind around what the big deal is about how many posts a particular poster posts!!!
The way I see it is that is someone posts a lot of good, helpful information, (IMHO) he/she is a generous soul, giving of one's time for the benefit of the whole. And even if some of those posts are debative in nature, it shows an intelligent, critical mind, with enough knowledge about various topics to be able to stand up to the counterpart.
Also, I have seen some highly intelligent people who are able to put their thoughts together in seconds (my sister being one of them) so perhaps the poster in question has this ability too, and his/her posting take no time at all. What the heck difference does it make, and why has it even been bought up?