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.