Yes, it does, but it is hard to pinpoint if it actually gets more noticeable at certain brightness or if there is something else that is causing it to get wavy like lower battery level? Higher processor? Fan spinning? Who knows. Under most conditions I barely notice it, it is only when I have a light gray or mostly unisome light color image.
While seeing the waves in regular screen, I did not see any problem using the link Colonel sent.
I will try 60hz and report back later.
8/18/2011 - X220, Intel i5-2540M, 12.5" IPS, FingerPrint, Cam, BT, Intel 6205 Wifi, 8GB, U2312HM on Mini Dock Plus 3
1/15/2012 - S405 (Wife's), AMD A6-4455M, 14", 4GB RAM, Windows 8
7/02/2015 - T450s Intel i5-5300U, 14" FHD IPS, FingerPrint, Cam, BT, SSD, Intel 7265, 4GB