Eh, it's useful for a power user to know which way to refine. Searching for [product 1234] has "about" 157 million results -> narrow the search -> [product 123

Eh, it's useful for a power user to know which way to refine. Searching for [product 1234] has "about" 157 million results -> narrow the search -> [product 1234 bookshelf] has about 3.4 million results. Searching for [product 1234defg] has "about" 280 results -> widen the search -> [product 1234 defg] has about 54000 results. If you just show a number that's around 400 for essentially every query, you don't have any feedback on whether to widen or narrow the search if you don't see the result in the first couple of pages.