Kaplan, the tax attorney, said that Credit Suisse clients haven't expressed as much fear as UBS clients did earlier.
"Before UBS, they were relying on Swiss secrecy," she said. "Now they know that Swiss secrecy isn't going to protect them. So the fear element isn't as palpable as it was at the beginning of this whole process in 2008."
She predicted that other Swiss banks under investigation will eventually settle with the U.S.
"Ultimately, they will reach agreement, and part of that will be to disclose the U.S. client account information," Kaplan said. "When that happens, those banks will send out letters to their clients."