First, the facts.
Windermere and Redfin just published a study showing that across 11 major U.S. cities, local broker sites such as Windermere.com, Redfin.com, and LongandFoster.com have about 20+% more agent-listed properties than two national portals, Zillow and Trulia.
The study found that broker sites display new listings 7 to 9 days faster, and that broker sites record sales faster too: almost 2 out of the 5 listings on Zillow and Trulia are actually no longer for sale, a problem with only 1 in 1,000 of the active listings on Redfin.
For the full report visit the Redfin Research Center.