I got one. The problem with JD powers is that they have an overall rating. This rating combines 3 of 6 scores and is what makers use to advertise.
Here's the JD Powers crappy review. Armada
They use the first 90 days of a brand new from first year truck('04) and use that for the ratings of a second year truck(Ratings for '04 are used for '05).
In '04 it had rattles, switch problems, and brake problems. Nothing serious, literally just some squeeks, a loose switch for the side window, and brake warping. They gave these all 2 of 5 and overall a 2 of 5 as their overall is a conglomeration of these categories.
Here's the categories and ratings:
Overall 2 / 5 (Verage of Mechanical, Body, and feature)
Mechanical Quality 3 / 5 (Includes warped brake rotors)
Body & Interior Quality 2 / 5 (Squeeks and rattles)
Feature and Accessory Quality 2 / 5 (includes power windows)
Performance 5 / 5
Creature Comforts 5 / 5
Style 5 / 5
So you can see, the first 3 gives us a 2.3 average or 2 rating.
Toyota Tundra
Overall 5 / 5 (They rounded up a 4.3, rounded down on ours)
Mechanical Quality 4 / 5
Body & Interior Quality 5 / 5
Feature and Accessory Quality 4 / 5
Performance 3 / 5
Creature Comforts 3 / 5
Style 2 / 5
It doesn't take into account that it got 5s in all other categories including drivetrain, nor does it take into account that all '05s have had these fixed.
So the Tundra has a 5 of 5 rating, with the true average of all 6 categories of 4.2.
The Armada has a 2 of 5 rating, with an average of 4.4.
Very disceptive and misleading too me. Also, I don't know why they would categorize warping brake rotors as serious as blowing trans, motors or rear ends.

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'05 Armada LE 4x4, Red Brawn, Graphite, Tech Pkg, DVD, Bench, Nitto Terra Grapplers 305-55-20, MB Motor Express 20x9 rims, 6000k HID lows, Silverstar 9005 Highs and 893 Fogs
'92 Vette Vert-All Black,6-Spd,Sport Seats,ACC,K&N,Custom CD w/sub,Chrome GS Rims,Mich Pilot Sports(275-40-17F,315-35-17R) GS fender flares,Pwr Effects Exhst,Z06 Brakes,Hawk Pads,lowered,camberbrace,Hurst,Stage 3 Clutch,single mass alum flywheel,'96 glass wind top,HAL Qa1 Shocks
'04 G35 Sedan-All Black, Sport pkg, wing, every opt.
'02 Jetta GLS 1.8T Girlfriend's
'04 Kawi STX-15F JetSki