Lengthy post from Graywolf in answer to the question “Does Google use whois information“?
The short answer?
Probably. Just a little.
The long answer? Follow the link above.
In summary, Google possibly use whois data for:
- a site under a manual review
- checking on domains that are close to expiring
- cross-matching whois data
- corresponding phone number and physical address
Only Google know for sure, but good article.