You might be correct about the reasoning. But those records are likely to work against if a suit ever hit full speed, because those scores could easily support the plaintiffs. "Gee, everyone over 55 ever hired has a 75%+ score. But your 25-54s range wildly from 56% and up."

Once the company asserts this defense, the plaintiffs ask for demographic details on every employee in the company, and what the scores were at time of hiring.