Project Zero has adhered to a 90-day disclosure deadline. Of 154 Project Zero bugs fixed so far, 85% were fixed within 90 days. Adobe Flash has the largest install base and number of build combinations of any of the products weve researched so far. To date, Adobe Flash team have fixed 37 Project Zero vulnerabilities (or 100%) within the deadline. Google has improved the policy in the following ways: If a deadline is due to expire on a weekend or US public holiday, the deadline will be moved to the next normal work day.”]
Source: https://googleprojectzero.blogspot.com/2015/02/feedback-and-data-driven-updates-to.html