Just a thought..
Whether they intended to or not, but not releasing a PR yet, they may have avoided the three day weekend from killing momentum. Should the PR have come this morning, today would have been a buying day and instead of continuing up tomorrow, there probably would have been a large sell-off - as in, much larger than usual because of the long weekend.
So, with any luck, we can get a PR tomorrow and have a nice big day and then take the momentum with us through the weekend and come back strong Monday.
GLTA