Why is the sample question in the site tour page about unicorns and daisies? Everywhere else uses a sample question from their site (to my knowledge).
This is part of the system.
There is an algorithm that determines which questions can be displayed in the tour page. I can't remember exactly what the requirements are, but in general terms it's looking for a short question with no fancy formatting.
Mods can change which question is displayed there, but only from those questions that this algorithm returns. Last time I checked, there weren't any eligible questions - and, having checked again just now, there still aren't any.