I had been taking classes to become an electrician at one of the bigger community colleges in my area (specifically LBCC) and my brother had been doing some renovation on his own home and asked me to help out so I wired up the boxes and switches and receptacles and while we grounded the switches and receptacles we forgot to ground the metal boxes them selves and the inspection failed but my brother tells me that the inspector said we're not allowed to pigtail the grounds between the boxes and devices that we have to use a long ground wire loop it around the boxes ground screw then run it up to the ground screw on the device ... can he do that? this runs counter to what I was taught which is to pigtail the wires to the devices and ground screws
If you are taking training this can be found in the NEC section 90.4 "Enforcement" the second sentence states he is the legal jurisdiction having authority for the enforcement of the code and he has the responsibility for making interpretations of the rules, ...
So in answer to your question yes.
The only thing you could do is to appeal it to his employer (the city council or whomever) or try and reason with him. Personally I wouldn't try and tick him off.
Like the 'Retired Master Electrician' said, yes they can as per the NEC....but too the fact is that the NEC are standards, and are accepted by the individual city as guidelines, but the code that you live by ULTIMATELY depends on the LOCAL regulations...and specifically where the NEC contradicts local regulation, local regulations are the only thing that anyone give a hoopla about. Generally the inspector will be under what is known as a "Project Engineer" or "Project Manager" for the jurisdiction under that governs the applicable inspection of electrical in the area. The other thing though to be aware of is that even if the inspector is a moron.....make sure you have your ducks in a row before you call him one....because they can have quite a bit of power and authority (it depends on the situation of course, but I am telling you this from experience as an Electrical Inspector for the State of Alaska for several years on quite a few multi-million dollar projects. My boss would back me even if I was wrong if he could have excused it politically. It is just how things work ....its a game in many ways that you have to play to be successful (imho)...
A wirenut/clamp is a continuous connection. Crimpclamp a ground connection in there and you're good to go. I do agree with your inspector - pigtails are worthless except in commercial work where you may run into alot of BX/MC cabling.
One thing you should learn in contracting - always know where to find it in the book. That trumps all inspector's opinions. You can politely point out discrepencies with your inspector, and earn respect.