Maybe I misunderstand something, but I thought the whole point of selecting two pivots in Quicksort was to reduce impact of particularly bad pivot selection.

In this case, I don't know.. Unlike in Quicksort, there is no huge cost after selecting the pivot depending on it's value.

I guess it could be useful if you could expect you're searching for items with a different random distributions than are the items in the list, e.g. you search for uniformly distributed elements in a list with non-uniform distribution (like a highly skewed one).