I often wish CU would provide more raw data in all their testing. However, 60k miles is far from meaningless when the actual quantity of wear is systematically measured during teardown. Also, we will never know for sure, but my reading of the report is that the differences they found between oils did not fall into any pattern - i.e., synthetic did not have any tendency to produce even slightly better numbers - and consequently the conclusion of the differences not being significant is probably completely correct. If so, the 60k mile wear rate would logically extrapolate itself throughout the remainder of the engine's life.
My interest in Redline is thanks to its POE base. You may be aware of the importance of polarity in engine oil. Conventional oils are polar thanks to the unsaturated nature of their carbon chains. As they are further refined those chains saturate, making the molecules both more stable and less polar. PAOs are in fact completely saturated and not at all polar. Polarity gives the oil its ability to stick to metal surfaces and is therefore critical to film strength, and for that reason PAOs need to be mixed with other base stocks - traditionally esters, now often lower-group oils - to perform properly.
POEs do not have that disadvantage and those used in motor oils are heavily polar. That can lead to odd apparent wear patterns as they react with the engine's metal surfaces, but it also gives them excellent film strength, as evidenced by higher HTHS than other oils of equivalent viscosity.
PEOs notwithstanding, I have not seen any evidence at all - and I have looked - that synthetic oil will make an engine wear less quickly than conventionals, and in fact it often seems as though the best UOA results tend to come from plain old conventional oils. There is an excellent example of that posted very recently in which poster Artemedes ran a fill of Pennzoil YB after two consecutive PP runs and wear went down quite dramatically:
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1220292&gonew=1#UNREAD
As for cleanliness I believe that is only an issue if an engine has design flaws or if an appropriate OCI is not followed. Synthetics do of course allow for longer intervals - however, when changed at appropriate intervals, conventionals appear quite able to keep an engine perfectly clean.
Thanks for the link, by the way. Interesting indeed.