I used to fly the 737-200 as copilot some time ago.. .We had the procedure that tha Captain always would handle thrust on T/O, because he is also the one who has to be ready for the abort. On the old 737-200, when Capt flying T/O, he set the thrust, and the F/O did the fine-tuning. You would have 2 hands on the throttle in the beginning of the roll....