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Yes it moves, but not much. 15F-20F degrees on that gauge is not a lot of travel. It's also a lagging indicator. The needle doesn't usually drop until shortly after the fan shuts off and the engine has a chance to ingest the cooler anti-freeze from the radiator. (I guess)

@DREDnot someone pinged me offline and told me about that newer style gauge. When did that come out? Seems like an easy upgrade if you buy the proper sending unit. Not only does it include the warning light, the range of movement of the needle between "normal" and "overheating" is much more...

I know that seems hot but from everything I've read and my own personal experience, that sounds like textbook temperatures and behavior. I think you've nailed it. The downside of the design is that there are no dummy lights or warning buzzers if you overheat and the range on the gauge from 220F...

The guys saying 220F is normal are correct but I feel that the fan should not run non-stop while driving. Clean the radiator from the back, and consider replacing the thermostat. My truck operates between 205F and 220F. During balls-hot summer temperatures in Maryland (90F-95F), in stop-n-go...