Netflix has continued to publish monthly rankings of ISPs average speed in delivering Netflix video content to subscribers. Though they first published data about the largest, national ISPs like Comcast, AT&T, and the link, they have an expanded list with many more ISPs.
I recognize two municipal networks on the expanded list of 60 ISPs. For March 2014, the Chattanooga EPB network is ranked 4th and CDE Lightband of Clarksville, Tennessee, is ranked 7th.
With the exception of Google Fiber and Cablevision, the top 10 are regional or somewhat smaller ISPs. Combined with the significant spread across the rankings of the biggest ISP, we see no empirical evidence for any kind of benefits to subscribers from scale. That is to say, Netflix data shows that bigger ISPs do not deliver better customer experience.
We do see more evidence that fiber networks deliver faster speeds on average, with cable following, and DSL trailing distantly. This is why DSL networks are losing customers where people have a choice and cable is gaining (most often where there is no fiber option).
Any claims by Comcast that allowing it to merge with Time Warner Cable would result in better service should be subject to extreme skepticism. Many much smaller networks deliver faster connections and raise rates far less often that Comcast, which is at the high end of frequency in rate hikes.
The problem with the biggest companies is that they focus on generating the highest returns for Wall Street, not delivering the best experience to Main Street.