No, the days are about the same.. maybe gets darker a few minutes later than it did a month ago, but not a lot.
Also with it being cloudy tonight it's going to be a little darker earlier than it was that day because it was a clear warm day when Lindsey went missing.
I usually go for an hour walk, which last month was around 9pm but now I am going earlier because of the loss of daylight. I am in Northwest WA. I notice a pretty rapid loss of daylight after summer solstice which was June 20. From this website, it shows we are losing about a minute of daylight a day.
http://www.timeanddate.com/worldclock/astronomy.html?n=234&month=7&year=2009&obj=sun&afl=-13&day=1
Keep in mind even after the sun sets, the twilight makes it still pretty light out for some time. The difference in daylight time between June 26 and today is almost 20 minutes.