If you aren't playing FPS games, then a monitor's response time is basically a non-issue for you. You just aren't going to be making the constant, high speed turns in other genres of games that will make input lag or ghosting apparent to you.
Now ghosting is one thing, that's when the display panel has slow pixel response times and you can SEE blurring due to groups of pixels changing colors slowly. Most modern displays, whether TFT or IPS, have GTG times low enough that you will probably never see this happen.
However, input lag is probably what you are really thinking of, and that can be an issue depending on an individual's sensitivity to it. Input lag comes from the image processing electronics that drive the display panels. When you have high input lag, you might be able to feel sluggishness in control when moving the mouse quickly. While GTG times can contribute to felt input lag, they are not the sole reason for it. The quality of the image processing electronics are the real culprit, and so, the only way to know for sure what kind of delay to expect with a certain monitor is to read reviews that specifically test for it.
Hope this helps you in anyway.