Sorry Monger, I see what you want to achieve in your question.
Probably not rocket science to say that multi-fly nymph fishing accounts for most hook-ups on most days.
I have subsequently talked with a fellow who is part of the team looking at the Bow and he indicated studies from other major rivers in Montana show that getting the catch rate down to 2x would be the goal. Also, it appears that our rainbows in the Bow are most affected, not the Browns.
There will be more to come to help us all get 'up to speed' on the science behind the findings. After talking to this fellow, I feel more confident with what will end up being proposed.
And yes, I believe 'fishing methods' during certain times of the year will be changing.