Verbal reasoning papers test four core skills: synonyms (which word means the same?), antonyms (which word means the opposite?), analogies (what is the relationship between these words?), and word-in-context (which word fits this sentence?). Every one of these requires deep word knowledge — not just recognition, but understanding of meaning, opposites, and usage.
A child who has practised synonyms and antonyms for 200+ words over three years doesn’t need to “work out” a VR question. They recognise the relationship instantly. That’s the speed advantage that foundations provide.