copied from Viktorius on FFXIVZAM:
"You have to keep in mind that Yoshida is being very careful with his promises. The reason why he uses vague and misleading words is that he cannot afford to mistakenly promise us something that he may not be able to fully accomplish at a certain date. Betraying a promise is the last thing they want to do to gain trust."
-end quote
Pretty much this. If he write down a proper data and then postpone it, with this troll army...guess yourself.
Some patch ago, they postponed an update of 2 days; it seemed the end of the world.