"Back-of-the-envelope math"?? That is just false. The FCC and Dept of Commerce create regular reports on broadband penetration. Here is the latest from the FCC, published just over a year ago:
https://apps.fcc.gov/edocs_public/attachmatch/DOC-342358A1.pdfAnd DOC's report from the end of 2014:
http://esa.doc.gov/sites/default/files/competition-among-us-broadband-service-providers.pdfThe FCC report states "76% of census blocks in the United States have at most one provider that offers a 25 Mbps connection."
The DOC report goes into more detail: "Only 37 percent of the population had a choice of two or more providers at speeds of 25 Mbps or greater; only 9 percent had three or more choices. Moreover, four out of ten Americans did not live where very-high-speed broadband service – 100 Mbps or greater – is available. Of those with access to broadband at this speed level, only 8 percent had access to two or more providers; 1 percent had access to three or more.”
So, yes, there is plenty of data that details the lack of competition in the broadband market. They don't need to do 'back of the envelope" estimates. My conspiratorial side would more likely think that the FCC are prohibited from specifically speaking to the competitiveness of those they oversee. That is why, even though the FCC has the same data and actually presents it graphically in their report, they are careful to say that they are not speaking to the competitiveness of the industry. Thankfully, the DOC is not similarly handcuffed.
I don't dispute your larger points, though I hold different views and ultimately a different position on the topic, but I just wanted to correct your assertion that adequate data on competition is not available.
To the OP, anybody arguing that the broadband market has healthy, vibrant competition is fooling you. It is at worst a monopoly for 76% of the US by census block, and at best a duopoly for 37% of the population. That bears regulating and close scrutiny, and repealing NN would signal to them that the watchman is off the job. There are plenty of articles that give details of ISPs trying to restrict sites like Netflix, or services like Facetime. If there were true competition, I wouldn't have to deal with random service outages from Comcast every month while paying a crapload for lousy broadband speeds and no cable. The FCCs efforts should be on bolstering competition in broadband before loosening the regulatory reins.