Overdrive can be a problem, but the response times they get aren't even close to accurate. Like Mark said, I agree and have seen a 1 ms being slower than a 5 ms. Now don't get me wrong, you can't really see ghosting unless you slow down recorded video or take still frames. On a 60 Hz panel, it doesn't matter what response time you have, you're not going to find a slow monitor in the modern market, you're just not. Some people prefer a faster panel which means a lower response time is actually useful. I've seen many tests on youtube were they use a 60 Hz panel against a 120 Hz, and claim that it's the 1 ms response time that is the reason there's no visible ghosting, that is not true, and never have been.
Think of it like this, if the...