Yup. Ryan & Pittman in their book, Noah's Flood speculate that it was this event that spread farming and the Indo-European language all over Europe. People were able to walk away from this event with what they could carry plus animals. The region around the Black Sea at that time was very arid and everyone was crowded around the fresh-water edge probably doing some sort of irrigation farming. Salt-water wiped it all out and they had to move up the river valleys.
I have this book. I thought it was very interesting.
I teach Gilgamesh, and every year I pass out a xerox article that gives the gist of the book. The article was also written by the authors. I will look at work what the magazine is and let you know. It is probably Science, Nature, Smithsonian, or Archeology. I have used the article since the book came out and forget the source now.
I tell my students that I don't know if this was the flood story, but that it may have been. I try to include some science and religion with the literature.
I am a little skeptical because people didn't have writing in 5600 BC and I have read that oral tradition doesn't really last thousands of years. I read one time that oral tradition lasts 500 years.
Still, the ancients dated everything before and after the flood,so I am inclined to think the flood stories from the ME are based on some spectacular cataclysm rather than the normal flash flooding that happens.