My experience of these tyres over 10k miles(700cx37c and 40c(35mm and 37/8mm actual)is simply remarkable in the positive.
Weighing around 85kg plus a bike and daybag,etc @ 13 to 14kg,I run mine at 45f/65r psi,on bad tarmac and rough stuff gravel/hardpack offroad.
I often say to myself when riding rough chip n seal,as the OP "I can hear it but I can't feel it".
During my own tests they've been within 1mph of 28mm tyres on a much lighter bike on 70mile test route rides due the ability to maintain a high constant average speed throughout the ride,because of their comfort,without beating me up.
One thing I've found is initially they felt slower,I put this down to the lack of high frequency vibration,which IMHO is false indicator of speed,and over longer rides is an energy sapper.
The difference between Hypers and narrow HP and other large section stiffer carcass tyres is clear and defined in favour of Hypers,and the numbers don't lie where speed is concerned,they may
feel slower but they're not.
I've had one puncture in them and haven't worn any out yet,though those 10k miles are shared between two bikes.
I also share Vantage's experience of higher PSI's only making the ride more uncomfortable without any speed increase.
I also find handling remarkably good,descending at high speed on sketchy tarmac is very positive,much faster and secure than narrow HP tyres.
Remarkable,incredible,are words I used to describe these tyres and they're the single most improvement to my cycling in 20+years
