I think the speeds listed are a little optimistic.
Yes, I had a 2019 1290 SDGT. Had it to Road America 3 times. It maxed out at 155 going up the front stretch. Went thru turns 1,2 and 3, then went down a nice straight and got 157 out of it. The article said 187! It wouldn't even pull 6th gear.Very much agree. Those speeds must be theoretical based on gear ratios and bench races.