Display Enlightment by NCX

The vx2458-mhd arrived. Good colors out of the box, coming from my placeholder IPS.
However, unlike the prad.de review and you suggest, it cannot be run in Ultra Fast response time, as this will add very obvious white trailing, just like with the XG2402 on Fastest:


That leaves Advanced, which is still decent.





EDIT:

So after a couple days use, I swapped to the Ultra Fast setting again and the obvious white trailing is gone?
Is this normal behaviour? Does a monitor need some sort of warming up?