His fastball(s) averaged between 88 and 89 last year, and even showed slight decline at the end of the year. http://www.fangraphs.com/fgraphs/3223_P_FA_20130405.png http://www.fangraphs.com/fgraphs/3223_P_FT_20130405.png
Twins have allowed a 1.029 OPS in the first inning, nearly 100 points higher than the next worst (Astros). Correia is just providing that vital consistency.