My S went through the process last year, and if I recall correctly, talent based scholarships were all over the place.
Some schools offer in-state tuition for their program, some offer large talent based amount, some only a little…some schools allow you to stack scholarships, some don’t…it really is all over the place, and even within your S’s results, I think you’ll find their doesn’t seem to be any type of ‘standard’ amount.
But I agree with @ElizaDoolittle 's comment of going back & asking for more, if it’s a top choice program.