So I actually watched the !@#$ing video on that article and read the text.
1) the video claims the average American will eat over 17 thousand wings in their lifetime. That's absolute horeshit. I will certainly eat that many, but I love wings.
2) barbecue is the most popular flavor? The !@#$??
3) As to the title of the article; nowhere in the article does it mention why there is this apparent shortage. Unless chickens are being born with one less wing, I think we're good.