The recent WT that has been discussed quite a bit here offers up this quote:
"We thus have no way of knowing the exact number of anointed ones on earth; nor do we need to know. The Governing Body does not keep a list of all partakers, for it does not maintain a global network of anointed ones." - Question From Readers, w2011 8/15 p. 22
As already noted, this statement is quite silly in an of itself, as the b0rg is truly a number-obsessed corportation. I think it may be a setting of the table of sorts, indicating they aren't going to report the partaker number anymore. It really does them no good anymore, and it hurts them a little more each year that it goes up and up. I guess we will know in a few months when the yearbook comes out.