[ChuckMcM]

I wouldn't be surprised either way, but why would the Porche engineers, getting the engine control software from the common engine control group, spot check the emissions on the test track rather than in the globally approved testing setup?

If you presume they are doing their job and not cheating, why would you cross check that your emissions were valid in both the dyno test and on the track? It requires that you assume your fellow workers are cheating, which is hard to do at most places.