Given the comments happening down below on whether you all trust Google, Yahoo seems to be pretty nimble with this announcement:
Today, Yahoo! Inc. (NASDAQ:YHOO – News) announced a new global data retention policy that sets an industry-leading approach to user data privacy. This new policy strengthens Yahoo!’s relationship of trust with its 500 million users world-wide and enhances its longtime leadership on privacy.
Under the new policy, Yahoo! will anonymize user log data within 90 days with limited exceptions for fraud, security and legal obligations. Yahoo! will also expand the policy to apply not only to search log data but also page views, page clicks, ad views and ad clicks.