We sat on the tarmac for 1 1/2 hours at DFW Friday and they didn't even offer drinks in FC. Actually, I think the only time I remember getting drinks in coach was at DEN a few years ago when we were waiting for a ground stop in ORD to be lifted. They came around with water and juice. I think we waited a litttle over an hour.
This past Feb. on a JFK-LHR in J, we got our pre-departure champagne and then nothing else was offered even though we sat at the gate for over 2 hours while cargo was being loaded.