it is between Flamingo and Tropicana, a little closer to Flamingo, and the Bellagio-Bally-Ceasars Place-Flamingo 4 corners. Right next to Paris, catty-corner to Bellagio, down the street from New York New York and the Showcase Mall.
Where exactly is mid-strip in your book? And how many pages are in it?
I'm guessing he's counting Stratosphere as the north end of the Strip, which would make Wynn the center.
The Stratosphere (as well as the Hard Rock and Rio) are classified by the NGC as "Las Vegas Strip". Then again, if you want to be technical about it, Planet Hollywood isn't even in Las Vegas at all, it's in Paradise, Nevada.