I think it depends on the time of day. I had two friends fly out of there early (6:45am flight) on 5/11 (Wednesday) and they didn't have any issues with security. My co-worker flew out around 3pm 5/9 (Monday) and was in security for over an hour, luckily his flight was delayed. I would get there early to be safe but Logan does have multiple security points so I would doubt any of them would be more than an hour even with the extra TSA lines.