Well, I guess their claim that this oil "Exceeds All Standards" must have some truth behind it. Hence the relatively low zinc and phos levels.
BTW, I got 500 miles on this oil so far and one thing I noticed is that I had to readjust my shifting. Now I have to lift off the throttle a tiny bit earlier when I change gears because the engine is now easier to rev up. UOA in comming in about 6 months.