https://en.wikipedia.org/wiki/Vlad_the_Impaler
http://www.livescience.com/images/i/000/071/430/i02/Impaled....
I was specifically talking about the connection to Bram Stoker's Dracula - Vlad was a real person, (with a bloody history) just as whoever built this English wall they found was/were (presumably minus a few gory tales), but that doesn't mean Stoker knew anything about him.
The excavation of Troy also destroyed a lot of evidence in the dude's eagerness to find the "original" Troy, so if anything it's a good argument against eagerly digging around looking for myths.
To be fair, The Bosporus isn't short of possible archaeological digs. I would hate being a developer anywhere around there.
I wouldn't read to far into the article, I don't think they are digging around looking for myths so much as excavating a undocumented, historic site and using the King Arthur story for media coverage or interest.
Note how everything related to King Arthur is simply added by the author of the article and all the quotes from the individuals involved in the project don't mention a thing about Arthur, but limited to: items located, potential origins of the items recovered, possible dates etc...
Much like Count Dracula (the evidence saying he was inspired by Vlad the Impaler is awfully thin and largely rests on everyone assuming an initial theory was correct and then laughing at anyone that wanted to say otherwise because "everyone" knows). If you go looking for nobles in that area that fought the Turks and were notorious...well, take your pick. You can filter by "son of the dragon/devil" (Dracula), but I've heard that "Dracul" was sort of an honorary title that wasn't shy among, you know, nobles that fought Turks, so that filter isn't likely to help much.