High tire pressures resulting in better handling / braking seems counterintuitive. Tires are the first part of your suspension and allowing them to deflect around corners and during braking is what I presume the engineers accounted for when designing the car to handle safely.
I'm not sure why Wayne would put that down. The only benefit to high tire pressures is better rolling resistance and turn response. Otherwise higher tire pressures = less grip = less performance.
I personally do not like to put too much air in my tires. But to be very specific, the current tires on my car now has maximum psi on the sidewall as 51psi. So, I am sure that means the manufacturer is saying if that tire is filled up to 51psi "cold",it is ok to drive with it.
And remember when we drive the tire heats up and that 51 can quickly get to 55 or more. I am sure the tire manufacturer is aware of that.
It's not so much the blowout pressure; the problem lies in significantly reduced performance and a large NVH increase. All that extra NVH in overinflated tires is transferred directly to the suspension components. Any small imperfection that was soaked up by the tires at door sticker PSI is now significantly increased and transferred directly to the suspension as well as tramlining and bump steer are now more noticeable.