I'm gonna take a wild guess and say that his recruiter is going on vacation next week through the 23rd, and by saying the boards have been pushed back until then will prevent any unnecessary calls to the cell during the horrible waiting period immediately after the 15th - therefore keeping his peaceful vacation uninterrupted...
Just my $.02...I've never heard or seen anything stating that a board was pushed back, in fact I remember once that they met the Friday before the weekend (the 13th) as the 15th fell on a Sunday. Unless this is some kind of cost-cutting measure being implemented to save a few dollars somewhere in the pipeline, I seriously doubt the likelihood that they have indeed postponed it.
But if they did, that sucks in a way as I'll be in Cabo San Lucas from the 21 through the 26 and might not be able to check my emails on the beach...that'll just postpone my good/bad news and make the vacation drag on instead of lingering smoothly.