The oil in the galley is not rushing past any leaks. It is flowing to each and every leak. The problem comes when the leaks at one area (like the cam bearings) cause a deficit at another (the rods). There are two basic ways to address that - cut back the amount of losses at the cam (or rockers, etc.), and/or increase the overall amount of oil.
We've all agreed the cam bearing / rocker oil should be restricted. As for the increase in oil, you can achieve that by pumping harder or by improving the supply path. All of us do that (usually) by smoothing the edges or ports, enlarging passages, etc. But where we disagree is in the idea that oil velocity creates oil supply issues. Oil velocity is a byproduct of flow - you can't have flow without some velocity - but I don't believe the velocity is anywhere 'critical mass'.
