Likewise for me in far more situations. I have only used 2 8ms TVs and neither ghosted.. but as far as monitors are concerned, I have used way too many of varying size and brand all of which were 5ms and NONE of which ghosted. Perhaps you have much more developed eyesight and notice far greater details because when I have used over 200+ 5ms monitors and none of them ghosted, why would your slight few in comparison have always ghosted?
EDIT: Hopefully I edited this in time before anyone starts an arguement, but basically what it comes down to is that every person is different and some actually will notice ghosting where others do not. Also, it is a matter of what the company is referring to when giving it a response rating: whether it's a gray to gray or a black to white response time measurement can show differences in overall performance. The last thing is that every monitor is different and some 5ms monitors may have better manufacturing, programming, technology, etc than other 5ms monitors.