I own several IPS displays, but none exhibit image persistence.
The only IPS display with this issue I have ever seen was my original Macbook Pro with Retina Display (which has since been replaced).
Now this problem is occurring on several top-tier iMacs in my office.
Isn't this 'solution' totally unacceptable? Apple should admit that this is a sign of a defective display. If your display has this problem, return it immediately for a replacement. If a replacement is not available, demand a refund.
iMac, OS X Mountain Lion (10.8.3)