I personally don't find it matters that much.
My 226bw is not one of the s panel's yet it delivers awesome performance. No ghosting, great colours and good contrast. No problems here whatsoever.
just required about 5 minutes of my time to set up colour, contrast and brightness levels. Once that was done i was good to go.
Remember too that its fast TN panel means its response rate is one of the best of the larger screens so is great for gaming!
gt