Even simpler. Turns out when I dropped those gears and revved to 6000, the waste gate controller was being asked to do something it hadn't done in some time. Freeing it up was a simple job. I can assure you I will not allow the waste gate controller to lie idle while I have the car.
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Something else which struck my curiosity is the relative position of the gas pedal in the Jetta and my wife's Golf. My comfort level is the Jetta is greater. I can go for hours without aggravating my sciatica. My limit in the Golf is about an hour. The cars are both 2016s. The seats feel about the same in shape and I have my driving position dialed in in both cars. The big difference seems to be the angle of the gas pedal. The usual position of the gas pedal in the Jetta finds it in almost exactly the same plane as the dead pedal so my feet are at a comfortable position. In the Golf, under the same conditions, the gas pedal seems to be about 10 degrees closer to vertical, resulting in an awkward angle for my foot. I never noticed this until I drove the cars back to back. I'm going to have to see if there is a way to adjust that. Either that or I will just have to drive a lot faster in the Golf.
"Honest Officer, I was just trying to relieve my sciatica!" I'm willing to bet the cop hadn't heard that one before.
Best
Les