It's true, no April fools. You can make your Browser tests run much quicker. How? By deleting them!
You will of course need to add a corresponding Kernel test - and that's the trick. Kernel tests run much faster than Browser tests.
But Browser tests make requests to the test site using an internal web browser, I hear you say, whereas Kernel tests make API calls directly. Kernel tests have their uses for testing APIs, but Browser tests are needed to test actual HTML output.