The great, vast majority of Comcast users are ignorant and get fleeced constantly (I firmly do believe the great majority are old people with their primary band

The great, vast majority of Comcast users are ignorant and get fleeced constantly (I firmly do believe the great majority are old people with their primary bandwidth "hogs" being an SD-broadcast Netflix TV show, 3 iOS apps / year, and a bank website login), so this practice of under-delivery visible to the consumer will probably never really stop (they're cash cows) until we get the FCC involved across the board showing it's a corporate policy to not deliver an advertised service. Unfortunately, they probably get around this too by putting so many disclaimers and exceptions in ads based around wi-fi inconsistencies and system loads that it makes any lawsuit about service levels impossible to prosecute successfully.