Yeah, the "score" part of the study did leave a bit to be desired. That was just Amsoil's way of assigning a winner across all the tests and the results, so somebody came out on top.
The real bummer of the test was this: None of the heavy-duty 15W-40 diesel oils so popular with bikers were included. Why? Amsoil excluded them because those oils don't formally compete with their motorcycle offerings.
Personally, I'll put my faith in a UOA every time -- especially when you see a 5,000 mile change interval, and on an initial load of an oil at that. That link I provided points to the very first UOA done on Amsoil's newer MCF 10W-40 here on BITOG.
At least for those using a "true" bike oil, the study provided good information on a test-specific basis. Amsoil deserves credit for that, regardless of their rating mechanism.