Would humbly remind interested parties of both Igor..Igorz..(?) Lab and Watercool's internal test findings; they saw a 2 degree delta reduction at best doing similar experiments; and while Igor i could easily discard, Watercool i cannot. Ask Jakob in the water cooling subforum about it.
Would also remind that anything around 1C is to be considered margin of error and that for all reasons practical, one needs deduce it from the above delta variation. For reasonable expectations anyhow.
In fairness, the kid in the video does state this favours AIOs a lot more than it does custom blocks, but at an average of 7 degrees given the fluctuations he mentions?
I'd opt for caution rather than pre-ordering. Perhaps his best pal Steve will eventually review it for him.
Pride, honour and purity.