This would be news to Bill Wilson who shot the first year or two in IDPA with a Beretta 92, perhaps to defuse claims that he started the organization only to promote sales of his 1911s. Older IDPA rule books specifically list the Beretta 92 and 96 as examples of SSPs.
The USPSA list of approved Production guns lists several different Beretta 92 and 96 variants.
Not to put too fine a point on it, but this individual is ignorant, lying, or just full of BS.