I haven't had any problems with security at LAX in recent months. There is the check-point between terminals 7 and 8 that always seems to be lightly used, but you have to find the slightly hidden escalator up to it. I am flying at 7AM to IAD this Friday and will post security times here Friday night. I am only doing a carry-on so I won't have the checked luggage experience, but I will try and notice if there are any significant lines.