After 22 partners exited Schiff Hardin LLP in January 2016 to form their own firm, its leaders likely weren’t shocked to see their 2016 year-end financials reflect a drop in gross revenues and net income.But the firm credits a windfall settlement in 2015 as the cause of a significant uptick to its 2015 financial numbers, which Schiff Hardin Managing Partner Marci A. Eisenstein said exaggerates the year-to-year comparisons.“We had a great year in 2016, and everybody here is totally thrilled with how we did …