This is for C/O 2010. This was a bad year, but not the year the bottom fell out. Lehman collapsed in September 2008 after firms had already planned their hiring for the year. It was the next year, OCI 2009 where they cut back dramatically. So the data for C/O 2011 is worse.
The data for C/O 2012 is better, but not by a huge margin. E.g. Chicago went from 69% big law SA's for C/O 2011 to 76% big law SA's for C/O 2012. Still down from 90% big law SA's for C/O 2010.
Pardon my ignorance sir, but where can one find stats on summer associate positions? Never seen that before and would like to.