Is that the way 'responsive' is being used in this particular context? What does reflowing a webpage when the browser's window changes size have to do with these timeouts and delays in the backend?
theres some ironic use of the word in the post above. they are mocking that the new and improved "responsive web" site isnt responsive in a speed context.
Compare Old reddit and New reddit by shrinking your browser window in the x-axis on desktop.