I've chambered just about all the different ways you can, and it didn't make a damn bit of difference on paper, they all shoot little knots. Gordy's method is great when you have a barrel that you want to time at 12'oclock with more run-out than what you want at the muzzle. A good barrel with minimal run-out doesn't benefit with being timed and centers in the barrel channel.
I can say if I have a barrel with .002" or a little more run-out within 2" it sure as hell wouldn't be going on a customers gun. Think about it....you dial in the throat where the bullet engages the rifling and the muzzle crown, predrill and then pre-bore back from the throat. You now have three points in line, length of chamber, throat and muzzle. Okay, you look through the bore in the lathe and see the jump-rope effect that the bullet rides through in the middle, no avoiding it. The cartridge and bullet is lined up and concentric with the throat, fired travels through the bore and leaves the bore lined up with where it first started.
Gordys method, you dial in the throat and a couple of inches forward, then pre-drill and pre-bore. Now you have three points in line, length of chamber, throat and a couple of inches ahead, assuming within that couple of inches ahead of the throat there is no run-out that was mentioned before. The bullet leaves lined up with the chamber, throat and first couple of inches, then goes through the same jump-rope effect and leaves the barrel however you timed it, but it doesn't leave lined up with where it started.
Now go back to the comment of a barrel having .002" run-out within 2"......plug that into the above method in that instance. Bullet leaves lined up with throat and rear of chamber, travels short distance, does the jump-rope (our .002" runout within 2") hits the next dialed in spot and then into another jump-rope until it exits the bore.
Now go beat your ahead against the wall and think this over some more...... Get your damn chamber and throat dialed in as good as you can, so the bullet is concentric when it engages the riflling. After that pray to the barrel god's that you got a good one. Finally, pull a single hair out of your head and look at it, .002"-.003" thick...think some more. If you are dialing in as good as you can (a few tenths or better) and your practicing good machining, I think you'll be just fine.
With all that said, consistent bore and groove dimensions and overall bore condition after final lapping is paramount in a good shooting barrel, IMHO