I’m curious why many people continuously think there was an ironclad “promise”?
There was no guaranteed promise, folks, sincerely. There was a stated intention to work towards a desired goal, which had distinct variables involved.
The statement from HQ management said :
Note that it said depending on content growth, and aiming is distinct from promising aswell. The reality is, growth has continued to increase, significantly. So the fact that the queue times have Not increased accordingly (to 45 days+?) is the first sign that they are contained. And that’s a good sign.
Second, the date today is less than 2 weeks past the end of June. So in relative timeframes, we’re still quite in that Summer zone.
Now, as many have seen the downtrend has already begun, Several new reviewers have been hired in the past few weeks, but no one jumps in the queue immediately… They have to go through the training! Right? 
Now a reviewer training can take some time, you can understand, I’m sure. While that training happens, other reviewers are also slightly slowed as they assist with training.
If another reviewer also needs to take a few days off for family travel, independently of team growth, the review team is simply not at full review operational capacity until training is fully complete, and then still it takes a few more weeks for new reviewers to get to normal speed, after training. But it’s almost done.
So again, there are no promises. However, since we can see that the general queue time is dropping already by a few days, slowly and continuously from its last peak, once the full team with all the new reviewers will be operating at full capacity, it stands to reason that the downtrend rate will increase faster. Time will tell, with the coming weeks, but that is the goal. It’s the same goal as stated above, relatively, and again it depends on variables as mentioned.
Hope that helps clarify the situation. Thanks everyone