I have a 15" LCD from 1998 and it turns on in a few hundred ms. 2010s+ LCDs take about 5-10 seconds which is insanely slow (even for a casual user, in which case it causes more confusion when plugging cables in because he's likely to assume the cables are wrong and disconnect them because the screen didn't react right away). TVs take as long or worse because they are simply more poorly designed. 5 seconds is literally longer than it takes for a CRT to turn on and have a viewable picture.

The general quality of hardware can be gleaned as the inverse of how much software is in it.

As for vendor fetishizing: All monitor/TV vendors are terrible.