Spinning the V-22

Some of POGO's concerns about the V-22 Osprey tilt-rotor aircraft found their way in Bob Cox's story in the Fort Worth Star-Telegram today.  But what Cox really added was some important context.  The military and contractors positively spin the V-22 by comparing it to Vietnam-era aircraft, rather than modern helicopters:

The [V-22] testing report (pdf) contains data on how far the Osprey flew, how fast, and how well, in performing various missions. All comparisons are made to the Marines’ Vietnam-era CH-46 helicopters, rather than more modern helicopters, which critics say can perform most of the same missions as well as the Osprey at far lower cost [ed's note: the V-22 price tag is currently $72 million per aircraft according to Cox's story; some quick division using a recent Selected Acquisition Report's yields a per unit price of $110 million, a price that likely factors in sunk R&D costs].

Cox also mentions the possibility of a behind the scenes battle between the Pentagon's leadership, quasi-independent testers and contractors over the writing of the V-22 report:

[Philip Coyle, former chief weapons tester at the Pentagon] said the language of the [V-22] report reflects the tension between the testing office and the military, and sometimes between members of the test team itself.

The testing office and the military contract with a quasi-independent agency, the Institute for Defense Analysis, for technical analysis and guidance. There have historically been strong disagreements between the weapons testing experts and the military over the conduct and outcomes of tests.

If there have been disagreements, what were they over and who won?