The gradient isn't too high from 6 to 6s in your chart. The 5 to 5s was double the speed, making that jump much higher than what's shown for the 6 to 6s.
True. They could just open another core like they did with the Air 2 to give a huge boost in the multi-core score.
My other post was my inner Apple pessimist talking. I've learned not to get myself too hyped up for Apple events over recent years, all that was happening was I was being underwhelmed, so I tend to lower my expectations for these kinds of things. Don't get me wrong, I want to see these kind of benchmarks, but I'll sit in my little pessimist mode until they are confirmed haha