Actually Acura (aka honda) did quite well in the tests. They and Volvo were the only luxury brands that did really well.
And honestly, the automakers that did poorly have shown they don't care about safety since small overlap crashes are common and very dangerous. And they knew this test was coming!
Many of the responses from the failing automakers have been "..well we did good on the old tests...". Basically they just don't want to upgrade their safety equipment, or at last put it off as long as possible.
ADAC, a German car club which does interesting car crash tests, looked into this issue a number of years ago. The video is pretty self-explanatory and shows just how easy it is for car companies to modify their cars to pass this sort of test. Yet many choose to just bury their heads in the sand.