A press release from USA today makes it official:
With the arrival of SMACKDOWN on Thursday, January 7 @ 8/7c, USA becomes the exclusive cable home to WWE's two marquee properties. Viewers can now bookend their week with MONDAY NIGHT RAW live on Mondays from 8-11p and SMACKDOWN on Thursdays from 8-10p. Consistently one of the highest-rated weekly series on cable, over the past 15 years SMACKDOWN has been broadcast from 170 different venues, in 148 cities and towns and in seven different countries including the United States, Canada, the United Kingdom, Iraq, Japan, Italy and Mexico. On January 7, SMACKDOWN will air its 855th episode from Laredo, Texas.