User blog comment:JordanaBrewsterFAN/Mass Effect 3 4th DLC./@comment-78.8.158.162-20130119154502/@comment-4807396-20130123202809

Given TIM's obsession with secrecy, have you ever considered that EDI and Miranda might have been misled or working off inaccurate information? Cerberus' ME2 Codex entry does state that the group has taken to stockpiling ships, agents and weapons, and a surge of goodwill brought on by a Cerberus-funded team stopping the Collectors' abductions of human could have brought in more benefactors for the cause.

And then you have the "integration" process, where Cerberus apparently can create effective shock troops in a matter of weeks. Consider that they've had access to this technology for several months before ME3, and... well, you can put two and two together.