I spoke with the TSA ID-checker guy when I was on the security line on Friday sometime around 4:45 PM (line was extremely long). This was for Terminal A on a B6 Flight. He said lately, every day between 4:30 and 7 PM has been a mad crush at security. So if you've got a flight in Terminal A, plan ahead, give yourself a solid 30 min from getting on line at security to clearing security.