Never heard of them either.
If she left a local agency to go to this one, I would say it would be about the same.
If she left a major agency like Dreams to go to an unknown agency, then I probably would not. You do not leave a well regarded agency to go to a lesser known one unless there was an issue.
If you are concerned about the reason why your agent left the agency and he/she will not tell you, I would contact the agency first. Often TA's sign contracts that do not allow them to solicit former clients when they leave or are asked to leave.