What do you mean by "whites". American "whites"? The last IQ report has many Asian countries at the top followed by "white" European countries. Whites and blacks are such generic terms. There are many different types of white, black, asian, etc peoples that have different cultures and phenotypes based on the region.
That site is a mess. Shows a chart where the average IQ is 82, links to a page saying the average IQ is 100 (which is the original design). Also cites a eugenicist and thinks that worthy of a passing footnote. Frankly, I wouldn't trust anything I read there.
At the elite level this would make a huge difference. At the state level not at all.