Impact Of WLNP Yet Again Predicted

Lots of research firms are all taking a crack at putting a number to the impact of wireless Local Number Portability. The Yankee Group now predicts that number to be 10-12 Million in the first year of WLNP. Yankee predicts a rocky introduction of the porting feature, and recommends carriers increase call center resources. They also offer the seemingly good advice that companies not port their numbers to new carriers immediately, but that they wait until the porting abilities prove reliable. The weird thing I see in this study is that current annual churn in the industry is just south of 30%, so the Yankee group prediction of 10-12M would actually be a reduction in churn! Anybody know if they mean the number as incremental?