The correct question is: Which September?
Is all seriousness though, SE always missed scheduled targets, but I'd imagine it would be sooner rather then later. People want to transfer to servers they have friends on.
That is probably less likely than "People will learn they and all their friends will have to transfer to one of the new servers if they want to play together."
Which is probably not a bad thing if you're in a fairly small free company. I don't think we could get everyone in ZAM to agree to move off Ultros, though.