The idea to provide different data from other websites is a good point - though there might be a reason why most other sites would chose the other way around. For me at least when I try to compare a bunch of new and old coolers I try to make an extensive list where I will plot down idle and load temp (and db) for the OC tests (since I plan to OC) and then compare all of them.
Since some websites has reviewed 'these' 30 coolers, and another website has reviewed 'these' 20 coolers - I can then pick a few of the coolers both have and use that to normalize those review-values over all the coolers in my list. (not perfect, but gives an idea).
Now even if I did only wish to compare results for so many coolers and only looked at coolers from Techpowerup. I'd have no idea how loud any of the tested coolers would be when my computer is on idle.. how could I since there is nowhere mentioned what speed the coolers runs at when idle. So I could assume that all the coolers runs at say 25% when idle - but it's a wild guess really as a poor cooler might already work 50% at idle, while another runs at 10%.
However, I'm not trying to tell you how to do your testing better, you guys do an excellent job at putting out all those reviews and numbers, and I really appreciate it. I just wanted to chime in on myself missing the info about acoustics during idle and full load
A final chime in on the Cpu choice. I personally (of the above-mentioned reason) is happy that you stick to the same CPU for quite some time and rather gives it the OC - since that allows more test-data to go down on the same chart.. Many websites seem to change every-so often, and that resets their charts.. making it impossible to compare a new cooler with a 1 year one.. since all those tests then would have been done with completely different hardware, and thus not comparable.