Maybe I'm missing something here. Didn't the police and/or FBI post their photos and names on Thursday evening? Wasn't that probably what "smoked them out" and started the whole chain of events that shut down Boston all day on Friday?
They released photos of the real perps at 5:00 PM Thursday. They received names within an hour, but don’t think they knew before then.
I would have thought they would have spotted the perps on video/pics within a very few hours. They knew the exact moments and locations to start looking.
Maybe they had a tactical reason for not releasing what they knew earlier but finally were stumped and asked for help, for real this time. Minutes later the public provided their solution (similar to how they finally captured #2).
They posted the pictures of the suspects NOT the names. They asked the public to help identify them. We didn’t learn their names until the police were chasing them.
I find it not credible that the FBI didn’t know their names when they let those pictures go public.