I don't buy it. It used to be you typed into a 1980s home computer and characters appeared the instant you typed them. With a modern computer, it could take a few seconds for characters to echo. If the system administrator wanted to pull up a process list on a PDP-11 running RSTS/E or an IBM 370 mainframe they could type a command and... there.

If your Windows computer is running slow, it might take 20 seconds or more for the task manager to start. Computers are orders of magnitude more powerful than they were back then but perceived speed is an order of magnitude worse and getting worse.

People who deny SLOW = BAD are part of the problem, not the solution. We really have to create a culture where slow software, slow builds and slow responses are seen as completely unacceptable.