Thought you were one of those who used their prepurchase details to log in on their own (those did not have any watermarks).
In general I agree not much more can be revealed of the game itself, however the test on its own is an NDA test so shouldnt be talked bout if it was playable or not during those hours or how it went on etc.
Only person who broke NDA in your case was your friend, but you shouldnt be talking bout it left and right on your own either .