Hope my second SS post will be better than the cameramen one (I realized they worked at other NBC shows -- Days of Our Lives, Leno, Weakest Link, Access (Excess) Hollywood, etc. -- since the show used to tape there).
Whenever Dave says at the beginning of the sweep that everything at the store's up for grabs, the shoppers never took him seriously. The only items they cared about getting were big briskets of beef, huge cheeses, garden hoses, diapers, and pans. I know you would find all those at a warehouse store, but NOT at a real supermarket. Oh yeah, and there were also those bonuses.
But have you noticed that many other items were never grabbed, like cereals, the upper tier of meats, frozen foods, soft drinks/juices, snacks, dairy, et.al. I guess the big items would be easier for the stagehands to restock in between tapings.
By the way, the Safeway store near my house almost resembles the Supermarket Sweep set...except of course, that there are computer screens at the checkout counters as in many other stores.
Jonathan Allen