The don't even wait for the award to file the protest.
I will refer people to my piece at Strategypage on the HH-47. It recently was re-run as a Dirty Little Secret.
Short version, the US101/VH-71 SAR variant got its ass kicked by the HH-47 in performance, past track record (four decades' worth), and existing logistical base/development risk.
John McCain needs to let this one go. The best chopper won.