No. Its the resistance to air flow in the duct that pushes the air out the supply branch and register.
So if a supply trunk has a static pressure of .3" at 1200 CFM, at 300 CFM it only has a static pressure of .02". So the air isn't forced out the close supplies like many thing.
So the furtherest supply and the closest supply will have the same percentage of reduced air flow.
When a supply near the furnace/air handler doesn't have as much as it should at the reduced air flow rate, it can usually be traced back to an ell or kink or something else causing more restriction in the run then originally thought. But the higher static is able to over come it.
Ran into it a couple times on 2 stage heat pumps. A near supply doesn't get enough air, and 2 of the furtherest away now keep their respective rooms more comfortable then they ever were in 20 years.
Installing mod furnaces, you just have to check the balance better before and after you install one.