I do a fair bit of tutoring on Skype, at $80 an hour. Often 5-10 minutes of an hour long lesson is spend watching my student deal with technical difficulties on their computer.
Their system fails them at very simple tasks: displaying a website (often the solution is use chrome or firefox rather then IE 8), opening a picture file, bandwidth for Skype video, audio/microphone output, RAM for running Skype + a browser, etc.
They waste money with me, and they're surely wasting time with almost everything they do. It's bafflingly inefficient, when you consider the marginal cost of buying a better computer at purchase time.