Stock 4670k gives me around 80-100fps @720p ultra-high preset in prologue level , and running around city gets just as low as 60fps with occasional drop to 57-58fps as game loads new assets. Usage is flat 100% among all 4 cores for the most part. I would say desktop CPU optimization is best of all AC games yet
You don't say

Ok, there is a difference between the CPUs but something gives me the feeling it's preemptive bullshit from Ubisoft to get to spend more time optimizing the X1 version.