Look at these landing pages for supposed gigabit internet from coaxial internet providers:
https://www.xfinity.com/gig https://www.optimum.com/internet/fiber https://www.cox.com/residential/internet/gigabit.html
Not a single mention of upload bandwidth anywhere.
Now look at fiber providers:
https://www.centurylink.com/home/fiber/ https://www.verizon.com/home/fios-fastest-internet/ http://chattanoogagig.com