The question has been raised, "Why was the announcement about the Congregation Bible Study announced 8 months before implementation?"
I believe it is simply a matter of how the WTS plans things. The Theocratic Ministry School schedule comes out in the October KM. How far in advance are the KMs written? How far in advance is next year's TMS schedule planned?
Since the CBS will be merged with the TMS and Service Meeting, and those schedules will probably be worked up in the next few weeks; the GB needed to let the R&F know what was going on. The GB couldn't let somebody in Writing/Teaching/Printing leak the information out. Having relatives and friends at Bethel, they always let us know when something new is released.
I believe if the announcement had not been made, as soon as the 2009 TMS schedule was created/hit the printing press it would have been leaked.