In Portland, Oregon, the local newspaper called The Oregonian has done a great service to Social Security Disability claimants and the public. For what I believe is the first time, the Social Security Administration ('SSA') released statistics about how often Social Security Administrative Law Judges approve disability cases. The Oregonian did a Freedom of Information Act request and obtained the information.
You can go to their website and type in a Judge's name and search their approval rates for 2006, 2007, and 2008. Here is the link: http://www.oregonlive.com/special/index.ssf/2008/12/social_security_database.html?app
You may not find every Administrative Law Judge in their database, and it only covers the 3 years for which SSA released statistics, but this is very helpful in understanding how frequently a particular Judge approves and denies claims. Every case is unique, but it helps you understand what you and your attorney are up against with a particular ALJ.
You can also view Social Security's own statistics on their website at http://www.ssa.gov/appeals/DataSets/03_ALJ_Disp.html. These are more current, and run through January 2010. ALJ's are listed alphabetically, but you can sort the stats by ODAR (hearing office) location and other categories.