OK I think I see what you guys mean. In stead of saying FD pull ratio, Sheldon says "The ratio of cable movement to derailer movement differs with Shimano's "road " vs. "MTB " front derailers." That I can understand. Pull ratio to me seems to imply brake pull or shifter indexing, I never knew there was a difference in how far a derailleur moved between road and mtn. Appreciate the insights!

This would also imply that I can keep my chainrings, but will most likely need a new FD. With flat bar brake/shifters I would guess that's a mtn setup, which would then also be a mtn FD.