In yesterday's column, we ran through some key takeaways from the latest annual tally of securities class action filings from Cornerstone Research. Today, as previously promised, we'll chew on the Cornerstone numbers with a pair of practitioners from opposite sides of the securities bar: Jerry Silk of Bernstein Litowitz Berger & Grossmann and Scott Musoff of Skadden, Arps, Slate, Meagher & Flom.