I find it a bit ridiculous that they claim three discoveries in "math, CS, physics" when they are basically all pure math (in particular, they all may be formalized in Lean) and only belong to these different disciplines for historical reasons.
The flagship case is AI itself, where we rely on benchmarks, not proofs (how could one prove "is good at seducing people").
Something that could have qualified as a "CS discovery" would have been, for example, a SAT or SMT solver that dwarfs in performance any existing one.
Something that could have qualified as a "physics discovery" would have been a new particle. Anyway, something that would come out of experimental data.
You can safely argue that it's statistics, because by construction it is. But then, maybe nothing is anything more than statistics.