That doesn't matter. The pixel output of subpixel rendering only works on monitors with the pixel layout it's intended for.

whoa, that is something i never thought about before.

Take a screenshot and zoom in on text, chances are that you will see lots of subtly colored pixels around it.

Yes, but font hinting takes advantage of the specific subpixel layout of your LCD (e.g is the order RGB left-to-right, top-to-bottom, two greens and forming a square, etc). If you take a screenshot and look at it on another monitor, it's quite possible for it to look awful because your RGB subpixel layout and the source differ.

Don't be so quick my dear, sometimes screenshots differ dramatically from what the user sees.

Yes, a JPEG image :)