GT300 new leaks?

[Final8ty]

The reason you can see CRT's flickering is because it's physically scanning the screen at that frequency, line by line. LCD's don't scan so that removes a big part of the problem right there.

The comment was not why, but to merely demonstrate that people can see the 60Hz flicker between refresh.
Now take that and imagine 30Hz refresh flicker & people here are saying you would not notice the difference in flicker.