Yep, it depends on the branch. Those applying for NA(AH), for example, would not expected to hear of an allocated entry date until at least a year after initially passing their first PJFT. The entry date itself, once notified, could still be six or more months further off.
Shortage branches (Chef, ET[ME], Stwd, submariner branches, etc.,) will be notified far sooner.
There's not much point, for those people who don't get the answer they would hope for, getting the hump, rather than getting the reality, I s'pose.