` :Ah, found the guidance on citations in the lead: Wikipedia:LEAD#Citations. I think the most relevant bit is ``The need for citations in a lead should be determined on a case-by-case basis by editorial consensus. Complex, current, or controversial subjects may require many citations; others, few or none. Contentious material about living persons must be cited every time, regardless of the level of generality.`` So, the question becomes: are the items tagged for reference complex, current, controversial or contentious? I'd suggest not: living people are no really involved and surely there's no controversy over the meaning of formula, tv viewing figures, who owns the commercial rights or that teams have extremely high budgets. People do like to squabble over top speeds and cornering forces for some reason, so there may be a case for that - although I'd still contend that the best place to ref is in the article.`