Tim Ellis of Redfin figured out a clever way to identify listing photos that were probably shot by professionals: EXIF data that identified camera type as DSLR.
The analysis of Tim's data shows that listings that are shot with a DSLR:
The WSJ Blogs had coverage today of the same data.
Number 4 is a surprise! However, with the long market times these days 10 days isn't all that significant.
A reminder that for real estate photographers, you should be collecting these kind of articles to use in your marketing. Particularly the one in WSJ just because it's likely to carry more weight with agents. Be aware that agents generally hate Redfin because it's a deep discount flat fee operation that is eating agent's lunches. Also, Redfin is making this case to prove the value of their company policy of shooting all their listings with professional photographers. Neither of these invalidate the data, they just effect the blood pressure of the agent that you are marketing so be aware.
I think this Redfin data and the data that Kris Bjarne Haug in New Orleans came up with make some pretty solid arguments of what we all knew- real estate photography makes a difference!