Soldiers who enlist on moral waivers -- more trouble in peace, but better at war?

I was struck reading an article by
retired Army Col. Charles Allen in the November issue of Armed Forces Journal that a 2007 Army study found that:

. . . soldiers who enlisted with
moral waivers were more likely to have disciplinary action under the Uniform
Code of Military Justice and to be discharged. But . . . such soldiers were
also promoted faster in the infantry branch to noncommissioned officer
(sergeant), more likely to re-enlist and received more commendations for valor
than non-waivered enlistees.