Beat the general requirement by over 1.5 minutes. Edit. It looks like it was about 4 minutes from possible alarm to the first big truck pulling up.
(2) The response required by paragraph (h)(1)(ii) of this section must achieve the following performance criteria:
(i) Within 3 minutes from the time of the alarm, at least one required aircraft rescue and firefighting vehicle must reach the midpoint of the farthest runway serving air carrier aircraft from its assigned post or reach any other specified point of comparable distance on the movement area that is available to air carriers, and begin application of extinguishing agent.
(ii) Within 4 minutes from the time of alarm, all other required vehicles must reach the point specified in paragraph (h)(2)(i) of this section from their assigned posts and begin application of an extinguishing agent.