Firstly, ClearType is to render text in a way that makes them look clearer for certain types of pixel arrangement. Microsoft ClearType does not support the current OLED pixel arrangement and won't fix the issue.
I used ClearType on all monitors I had, the first time I got my old DW, I noticed the fringing was unfixable by ClearType and returned it, it took no more than a couple of minutes for me to notice.
It's honestly easy to tell because there is some rainbow effect glowing around the text, and perhaps more prevalent in some types of fonts and backgrounds.
These are from AW3423DW, IDK how obvious it is to others. At its current scale which is not even close to being called pixel peeing, do you see it?
View attachment 38164
These 2 are from a non-OLED panel that is only 1080p, and the left one is calibrated with ClearType.
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You see why for ppl that already used ClearType throughout different systems, it's quite obvious.
Also, I am not saying if anyone should buy or not buy based on this, or whether the monitor is good or bad. Just pointing out the problem that others have been talking about.
Tbh, these images r also nothing compared to reality, where more details can be seen..