Here is my thought, from my experience as an admin, i've noticed some folks prefer longer posts and some prefer shorter ones. I see no fault in either, really. each player, as long as they make the minimum, have the right to make their posts whatever length they want. I see absolutely no reason why we need to make word maximums.
So, from my position as head admin, I do not want to create word maximums. Minimums seem to be necessary to keep the site from having a lot of spamming, but I do oppose a maximum.
From a player standpoint, I try to honor, as best I know how, the player I'm rp'ing with. For someone to say they dont want to take the time to read my post would suggest to me that perhaps I am not the right player for them. If the player you're interacting with makes posts, generally, that are either too short or too long for your own personal preferences, then my thought is that you do have the right to seek out a player with a style much closer to what you're looking for in an rp experience.
So, no. I do not want to see word maximums imposed here on PA. Bottom line.