You still miss the point of what DrMrLordX was saying. He was talking about overall SoC performance/W and you are talking strictly about ST performance without any relation to power.
Nope. There isn't any mention of ST-performance, only MT-performance. But A13 achieves those MT-performance figures with only half of big cores of S865. If we take third exponent as scaling reference that S865 with only half the big cores would consume 2^3/2 as much power as it does with 4 cores for that MT performance. So that S865 with same performance but only two big cores would consume something like 2^3*5W/2 ~ 20W of power.
Of course those numbers aren't exact as they are calculated from SOC power instead of core powers and there are also little cores - but it still is good reference as how efficient Apple cores are - at this time there simply isn't any other high-performance cpu cores that do come even close to that efficiency what Apple cores achieve.
Apple cores are so good that it's actually hard to understand.
EDIT: rethink calculations.