I fly out of BWI a lot, so I know what you're talking about. However, although the lines are often very long, I will say that they actually move much faster than you think they will.

Several times when I've arrived the line has stretched all the way down the hall, and it looks like it will take an hour to get through. So I make my way to the back of the line and watch in amusement as every person makes their way back there with the same draw-dropped expression and saying something like "I've never seen a line this long!"

In reality, the longest it's ever taken me to go from the back of that line to security is about 15 minutes. The line moves very quickly. In fact there are signs along the hall that say "10 minutes from here to security," and no one seems to believe it, but they're true!

Now, as far as the Greene Turtle, I'll also disagree with you a bit there. I ended up having lunch there a few weeks ago after a flight was delayed, and I thought the food was about average for an airport pub/restaurant. Unfortunately there aren't any great food options in terminal D, in my opinion.