http://findarticles.com/p/articles/mi_m3190/is_42_40/ai_n16788777/

In this article it discusses how Pizza Hut is working toward expanding their Pizza Hut/Wingstreet to 1000 units by next year. Currently they have over 800 locations where they have an extended menu due to the Wingstreet addition, which has inturn risen sales significantly. This shows to be a very good business venture due to the fact that there is a rising trend in hot wings and food with extra spice and flavor and at the same time, any expansion of a menu to that extent should aid in sales due to more options being available to the costumers. Units that have the Wingstreet branch also often have more seating, bars and other marketing options. Many other pizza companies have had wing options in the past, however, unlike Pizza Hut/Wingstreet, they have had a lot less options to go along with just the basic traditional buffalo wings. It seems that the expansion of the Wingstreet brand is in the best interest to the Pizza Hut company.