Not really true. At least in my internet home searches, there has never once been a map. MLS.com doesn't have a map for my city neither do any of the major real estate websites that I've browsed (I just checked today to verify).
All I get is a list of homes with prices, street names, photos, and other information. If a buyer can't tell the location quickly from the street name, that buyer often will just go to one of the dozens of MLS listings that they do recogonize as being in their desired neighborhood.
Unless I'm blind.