I just tried "McDonalds" and only got 50 straight McDonalds results. "Burger King" nets 23 Burger Kings, one "Spareribs King" and one "Burger Chicken King". Gotta love inconsistent experiences between customers / regions.

Also, Apple is gearing up to stuff ads (cough "sponsored results" cough) into Maps, at which point it will probably start suffering the same problem..