As for whether the case was a slam-dunk after surviving the motion todismiss, Kirby cites a number of statistics about the riskiness of class actions but none indicating the percentage settled after the judge rejects a motion todismiss.
Since virtually every securities class action settles after surviving a motion todismiss, the risk of non-payment is presumably much lower for plaintiff attorneys and courts might consider lowering or eliminating the multiplier on billable hours the firms rack up after that.
This is a little naive given that the modern securities class action is mainly an exercise in getting a case past the motion todismiss and only a handful of cases have every gone before a jury.