Magnets affect electrons only when they are moving. The force on an electron in a magnetic field is proportional to its speed. If it is stationary, the force is zero. In LCD screens there are no moving electrons, except when the image changes, so there cannot be any effect with a steady display. Any effect during a moving display will be very small (because the electrons in and LCD cannot drift as they can in a CRT), and will disappear once the display is steady again.
The other problem with CRTs is that they can become permanently magnetised, and thus always affect electrons as they fly to the screen. That is why CRTs sometimes need to be de-gaussed. In LCDs there is nothing to magnetise (and no flying electrons) so this effect is also negligible.
Also, I noticed that both your links point out that LCDs will not be affected by magnetic fields (actually the Win 7 link says that any effect is too minor to be visible).