My son wanted a LCD HDTV or monitor in his bedroom for Computer games and Xbox 360 (then Playstation3 later)We were looking at response times at the same numbers you were. We came across a 32" Niko brand monitor at 20ms response times and immediately discounted it....until we started reading reviews on it. One person said the response times were erroneously reported on the sellers website. Another person said it was really 11ms. But then we started reading reviews of people that already bought it and played these games already and had no problems what so ever. So we bought it and they were right...NO GHOSTING AT ALL WITH ANY VIDEO GAME! No mouse arrow dragging , nothing! My neighbor, an Electrical Engineer, saw this and wanted one for his son...so he did his research and even though he SAW my son's monitor in action, didn't buy it because of the "20 or 11ms response times"....so he bought a View Sonic 32" monitor with 8ms response times....it ghosts like crazy!
This made me really change my views on the WHOLE response time thing. I don't know what to believe anymore and I basically go by user reviews or asking someone who owns it before we buy. Now, I'm involved in helping my older brother purchase a LCD HDTV for his house, just for HDTV viewing and have narrowed it down to a Sony 40" TV with 6-8ms response times with 10bit processing...and this will be for movies and his son using Xbox 360 occasionally....and I STILL have to wait until we talk to someone or read somewhere as to it's performance. Is this one of those "different companies rate things differently?"....I have no idea. We all get caught up in the numbers.
So I guess what I'm trying to say is find someone with this model you are choosing and go from there....the numbers can sometime be very deceiving from our perspective!