It looks like you can see the lander, up in the air and casting a shadow on the surface in the 2nd image. If it is, you can get a good estimate of its horizontal velocity from the image timestamp.
That speck appears to be there in the first image as well, though not as bright...?
I wonder if Philae actually landed exactly where computed (the green square), and if so why the dark dust does not radiate from that spot, but "down-wards". Perhaps Philae hit the surface at an angle?
https://plus.google.com/app/basic/stream/z13gzxiwdkq2clyew22...