I have recently completed two new pages for my informational website on Social Security Disability called The Ultimate Disability Guide. The first new page deals with ssdi and ssi denial rates. The information provided should at least give you some idea of the rate at which SSA denies and approves claims. The chart shows the allowance and denial rates for ssdi and ssi at application and reconsideration.
The second page is about the backlogs at SSA and the average processing times for each Office of Disability Adjudication and Review or ODAR. This basically covers the time period between filling your request for hearing until a decision is made. So if you are one of the many people wondering how long does it take to get a decision at the hearing stage or as Social Security likes to say how long does it take for the claim to get processed. The above page link is for you but try not to get to discouraged by what you see.
