User blog comment:Legionwrex/Citadel Review./@comment-5212406-20130307060402/@comment-5178975-20130310230423

And, Cerberus's training consists of shoving Reaper tech into the person's head and saying "congratulations, you're our newest completely expendable guy" so it's no surprise that some mercenaries who've actually had military training would be harder to fight than them.

Also, Cerberus probably ran out of Medi-Gel when one of their experiments got loose and killed all their guys.