Warblers returning south already

What do you know, somebody blogged a bird sighting I sent to NYSBirds-L:

http://mariewinnnaturenews.blogspot.com/2012/08/warblers-heading-south.html

At first I thought I had seen Yellow-Rumped Warblers, not Redstarts.  They were moving pretty fast and I got neither a photo nor a good look through binoculars, just a flash of yellow on the side. (I did get a good look at the Black-and_White Warblers).  But when I looked at the failed photos, I saw the tail of a Redstart moving out of the frame.

I saw a Black and White a week ago, Louisiana Waterthrush on July 21 and Northern Waterthrush on July 25.  These are all pretty early.