I will let the working sparkies fill in the blanks about the last 20 years. I am retired but testing in 1 and 2 family was pretty much nonexistent. They test GFCIs with a bug eye tester but not all of them and not all the time. Our GFCIs are per branch circuit, set as 5ma and not one across the whole service like I saw in New Zealand. As often as not the GFCI is built into a receptacle in the area served (bathroom, kitchen garage etc). They do have the ability to protect down stream devices if connected properly.
Inspection is really a visual thing for the most part. Since we use a center tapped 120/240v transformer, hooking things up wrong is harder to do and easy to spot visually. Building grounding is really just assumed to be OK if one of the accepted grounding electrodes is present and properly connected. I have seen ground testing but these were commercial jobs with multiple electrodes an an array. (notably, toll booths out in the boonies and radio towers). It was mostly for lightning protection.
In 1 and 2 family the concrete encased electrode has become the standard and inspected as part of the footer inspection. Rods are inferior electrodes and water pipes are plastic.
The only debate seems to be whether a rebar turned up inside a block core is a valid connection to the footer steel.
[Linked Image from gfretwell.com]

Greg Fretwell