Display Enlightment by NCX

Here's a backlight bleed test.
https://www.youtube.com/watch?v=aXHcRiSK_ys

My two HP monitors test almost perfectly. The Asus Eye Care IPS (the generation just before the current release) had really bad backlight bleed according to this test.

Are my HP units unusually good, or was the Asus with very noticeable bleed an anomaly?

I'm also wondering if how roughly the monitor is handled during the shipping process from the factory to the customer affects backlight bleed.