According to Heejin Lee and Jonathan Liebenau, "Time and the internet", in Hassan and Thomas, Eds., The New Media Theory Reader, "speed is contagious", and so everything is faster today, from plays and musical performances to Norwegian politicians:
The claim about musical performance seems questionable to me, but as a phonetician, I'm more interested in those Norwegian orators and their precisely measured speaking rates. However, Lee & Liebenau's paper lacks footnotes, and I was not able to find anything promising in the bibliography, and I got nothing from Google Scholar searches combining "phonemes per minute" with various keywords such Norway, Parliament, debate, etc.
Can anyone do better? Is there really a political scientist who measured the speaking rate of Norwegian politicians between 1945 and 1995? Where is this documented? Did (s)he really find an increase in average rates from 584 in 1945 to 863 in 1995? What were the other details?