The lines aren't any longer or going any slower than I encountered last year. Unfortunately, that means to get to the C or D concourses, you could be looking at 1+ hours in the security line.
I flew out of D on Monday to catch a 10:30a flight. I got to the airport at 9a and was at the gate by about 10:10. I think it was probably about 30-40 minutes in the security line, but by the time I got to the screening point, the line behind me was about twice as long as it was when I got in.
d