RetroGaming

Nope. There is an industry standard way of measuring latency, and it's measured at the halfway point of drawing the image.

Edit: you can measure this through Nvidia's LDAT system, for example, which uses a light sensor placed in the middle of the display combined with detecting the exact moment you create an input. The light sensor picks up a change (such as the muzzle flash in an fps) and measures the difference in time. If you were to make this work on a CRT running at NTSC refresh rates, it would never show less than 8.3ms when in the middle of the screen.

If you are measuring fairly with techniques we use against LCDs, then yes, CRTs have latency.