I disabled it earlier today at the request of another admin as there were certain "issues" related to post-counts being visible. It's currently in a trial phase so if the solution isn't ideal then another approach may be tried.
In the meantime, a member's post history can be viewed by clicking on their forum name to the left of the any of their posts and selecting "forum posts" from the bottom of the list (I think! My test user was previously set up as a moderator but it should be available to all members.)
