It's pretty ballsy & risky for HQ to give a date even a "tentative" one at this point, so I'm gonna take it as a good sign.
I can only imagine the reaction if there are any additional delays.
So while they say "tentative" I have to assume it's actually scheduled and is most definitely gonna happen, unless something really hits the fan. Obviously each test has a greater chance of succeeding then the previous & they are being more vigilant with each go around.
At this pont I'm not even gonna bother keeping my expectations in check.
Let's kick the tires & light the fires!!!