Not only is Samurai Shodown a terrible title, giving it away free has actually provided everyone with a way to see the lag.
Try and complete the "Just Defence" basic training and you can see it clear as day. When the opponent starts to swing you have to hold left to defend. I challenge anyone to pass that training without preempting the attack by luck, if you hold left as soon as the character moves you'll fail over and over again.
I'd convinced myself there was no noticeable lag whilst playing destiny 2, but it's very evident in this particular section of Samurai Shodown. To be clear I still love the device, and service but the lag IS very obvious here.