the further out the hole is the less of an effect the arb has!
Sorry, but that is pure BS.
Go and tighten some wheel bolts with a windy gun on max setting. Then get a 30" breaker bar, and stand on the end tightening them further. Now get the weedy short wheelbrace out the boot and try undoing said wheel bolt.
So like others have said the inner hole is the stiffer setting!
(i could be wrong but that would mean all the setup work on race cars and running my own race cars for the last god knows how many years has been completely wrong!) 
Best I avoid Jabbasport then.
I suggest everyone reads some proper automotive enginneering text books, then do the same with some elementary GCSE Physics text books. Or e-mail those geeks at Bang Goes the Theory. They'll prove you all wrong.
Cheers dude! nice to know there are some friendly faces about eah...
might want to read up about arbs work first tho...
Where is the load (force) coming from,...the wheel, the wheel is trying to twist the ARB, there for its putting load on the bar.
now put that to your theory, more weight on the bar at a longer distance from the pivot will bend (or twist) the bar easer than it would be for the same amount of load at a shorter distance from the pivot
Might want to understand how it works before you slag of someone thats been working with them for god knows how many years (with 5 championship wins out of 4 championships entered i might add too)
Cheers.... google is your friend btw
