Its a tough decision to open this test footage up to you guys, and if it keeps getting critiqued for what its supposed to be, that decision is gonna start going the other way.
OK, it's honorable and laudable to post these stills at this early stage, and it does open them up to criticism. But the team knew that, and threatening to take away your toys and go home if people call out artifacts is not respectable. If you don't want them picked apart, then they damn well shouldn't have been posted.
After looking through it, anyone can see that the last thing this board needs is more mindless cheerleading. The groundless naysayers are annoying and occasionally maladjusted, but one "AWESOME!" message after another simply results in 15-page-long threads that contain very little productive discussion. Furthermore, this juvenile fawning embarrasses and undermines the credibility of Red supporters, some of whom take an objective, hopeful, but discerning view of the product.
These images reveal some shortcomings. Deny it to yourself if you want, but deny it to those with open eyes and your credibility will be zero. The point of an "open" development project is to obtain useful feedback, and an analysis of these images is useful feedback.
Did people consider that perhaps there are aspects of the encoding that can be tweaked at the expense of others? Some kinds of artifacts that result from allocating bits against others? Then the Red team needs to know what kind of problems are going to result in negative reactions from us.
If all you're going to do is shout "Hooray! OMFG! That's totally awesome! Perfect! Ship it!", then Jannard and company are wasting their time monitoring this board or sharing anything with us.