"Narrow tires and wheels still work better on high-quality indoor tracks. When Bradley Wiggins broke the hour record he ran on very narrow and thin tires. He also ran them at 300 psi and used Argon gas on the most efficient surface in the track cycling world. He made his run under extreme conditions. Even on high quality concrete tracks, wider tires start to perform better and we find optimal pressures quickly move toward 110-120psi on excellent concrete surfaces. Again, that’s how quickly the performance drop-off occurs.”
At high cadence though? There is a definite 'bounce' you can feel in tyres at lower pressures when you get over 120rpm. All the test seem to be designed for road/triathletes who aim for a cadence range of 85-100rpm
This is the article referred to in blog above; Josh Poertner was Zipp's designer who left and bought Silca
http://trstriathlon.com/talking-tires-with-joshua-poertner/.