Current State of End-Game Contents - A Blog Post from A Japanese Player

[Pibz]

This. I beat T6 far faster then I did T5. So why do I see people still struggling with the early parts of T6? If there is actual "skill" in T5 and earlier content, why doesn't it just carry over for everyone?

Oh so your anecdotal evidence doesn't carry over to everyone? Brilliant you should publish a paper on that.
Also T6 is the introductory turn in Second coil while t5 is the final turn of the first one.