playBunny: I disagree with the 24/22. Here is the whole text for context.

"Split your back checkers (24/23) and slot your five-point. It was right to split your back checkers until recently, when modern computer rollouts showed that slotting is usually better, but you can vary this depending on the match score."

Clearly it is comparing splitting to slotting and assuming the 13/11.

In fact later in the site it has the two options:

"Opening 24/23, 13/11 13/11, 6/5"