Interconti
I wouldn't have a clue of the ratio, but I can say that (to the best of my knowledge) every F/O that is eligible for either accel or normal command is being upgraded. As I understand it, the percentage of DEC that are passing the recruiting is improving, but still not nearly as many as expected, so still enough commands for F/O's from within the company.
On the 777 it is a different story. There are no/few upgrades at the moment because we dont have any new aircraft arriving until next year. A few upgrades have been generated by Capt's transferring to the Bus because of the chronic shortage there, but I believe the upgrades are coming just after the 3 year mark at present and will probably be closer to 4 years by the time we ramp up again. Once the new a/c start arriving, i would expect to see DEC's on the 777 as well.
dmf