My friend Stu and I walked around the Tidal Basin yesterday looking at the cherry blossoms. We were both surprised at how few people were out seeing them.
Now the blossoms are not at their peak which might explain the lack of huge crowds. You can tell the blossoms haven't reached peak by a couple of these pictures.
Maybe the crowds will be coming in the next few days which will be warmer than normal and will definitely make the blossoms pop.
Some more of the wonderful cherry blossoms.