From a conversation with Richard Wilf, Huron Law Group:
A class action suit is brought by all plaintiffs equally, no matter the number involved or even the identification of those plaintiffs before the action is filed. Ever see those newspaper ads or TV ads suggesting that you, John Q. Public, may be a bona fide plaintiff after the fact if you have such-and-such a set of circumstances? This suit welcomes any person who feels he has a legitimate claim, the legitimacy to be determined by The Court.
There is no "lead" plaintiff. The attorneys for the plaintiffs present their evidence, gathering whatever they feel pertinent, identifying the source as required by law for cross-examination.
Huron is a big-deal law firm, spending tons of their own money so far. Give them some credit! They, or The Court, are not going to let some kid rant and rave and "spoil" their case. Nor are they going to let some two-bit ed consultant-type company influence their decision. I'd be much more inclined to go with Huron's advice than I would from a bank employee whose claim to fame was a picture in People magazine.