In fact I had the feeling it could be that, then I was able to test this with the 3D Vision system.
When the 3D Vision glasses are about to shut down, the left eye blink half a second ON, half a second OFF about 5-6 times. This is much longer than blinking 60 times a second.
In this half a second where the LCD are set to block the light, I was able to see bright parts of the screen and this could explain why we see ghosting/crosstalk with any current 3D TV/Monitors.
I believe the next big improvement will have to come from the glasses and this is somewhat great news, as all curent 3D TV/Monitors are actually doing a good job for delivering 3D. While a firmware can offer some very small improvment on this, I believe it's the glasses that need to be worked on. They will need to find a way to properly block the light more effectively. In the pasts years they were able to improve LCD TVs in a lot of way, Plasma also with better phosphor and such and now it's time someone focus on glasses. Something that should be easier to do than with any 3D TV set.
Now if I could find a trick on the 3D Vision set to manually control the glasses state, it would be easier to demonstrate.