Maybe the secret is not really about the age or management skills, but rather that Chrome is an insanely profitable product (+ in a monopoly) so the pressure is

Maybe the secret is not really about the age or management skills, but rather that Chrome is an insanely profitable product (+ in a monopoly) so the pressure is rather low compared to a startup. Additionally whether a specific feature is ready or not for a specific cycle is not that important considering that there are releases every 6 weeks and even before for metrics gathering activities.