I think this is also the reason the Axiom Journey rack is so solid and can hold a lot of weight is the second complete loop to the rear.
One other thing I consider when buying a rack is does it have a top panel on it. Since I don't run fenders, the top panel on the Journey, the Jannd, and that Bontrager keep mud, water and debris from splashing up on my bag that rides on top of the rack and makes sure no material likely slips down to rub on the tire.