I would totally believe you if you handily beat your brother with the mazdaspeed, but since you didn’t, well then it’s your opinion.
I would also totally believe you if I hadn’t walked around and talked to other folks. The high horsepower people were not happy, “man this course is fast!” or “I really got the power on” was not something I heard once. Perhaps someone else can chime in here, since this seems to be a two-side, no budging conversation.
I know you don’t make up numbers, I was just asking how do you know if this was a horsepower course when you yourself were driving on it with 168.