Yes, looks fine. You can get the total turn time from the log.
In this case you took 0.42s to surrender; so you can take that off the 3.58 giving a total time of 3.16s.
Better to quit shortly after reaching the finish, then there's no working out involved.
[00:00:53.16] ��� Null starts turn
[00:00:57.08] ��� Null fires Surrender
[00:00:57.10] ��� Null ends turn; time used: 0.42 sec turn, 0.00 sec retreat
[00:01:02.90] ��� Game Ends - Round Finished
Team time totals:
Null: Turn: 00:00:03.58, Retreat: 00:00:22.02, Total: 00:00:25.60, Turn count: 8
End of round 35