Soriano's lack of control nullifies C.C.'s Gem: Did Girardi's Decision blow the game?

Riding on the masterful pitching performance of C.C. Sabathia and a pair of home runs by Mark Teixeira (a 3-run shot) and Andruw Jones (a solo shot), the Yankees were poised to win over their perennial victims, the Minnesota Twins last night.  Up 4-0 in the eighth inning after C.C. retired the last 17 batters he faced ( 7 IP, 2 H, 1 BB, 6 SO), Girardi brought in his volatile $35 million dollar set-up man, Rafael Soriano, to the bewilderment of fans and analysts alike.  In a manner similar to Joe Torre's rigid (and arguably ineffective) bullpen formula, Girardi it absolutely necessary to bring in his second best reliever in an unnecessary manner.  When asked about his questionable decision, Girardi merely responded: "Soriano is our eighth-inning guy".  With this mentality, Soriano's arm and notoriously low patience will be depleted by July, and their $35 million dollar investment will be wasted.  It's not like Girardi's bullpen was depleted of pitchers either.  Did Girardi really not trust David Robertson enough to bring him in with  4-0 lead?  The baseball pundits have touted the Yankee bullpen as the class of the MLB.  This is in no small part due to the relievers not named Mariano Rivera and Rafael Soriano, David Robertson included.  Robertson has been an effective hurler for the Yankees in the last two years.  His strikeout per 9 inning ratio is phenomenal, and ranks among the best in the entire majors (his k/9 inning ratio of 13 in 2009 led the MLB), and has been far more consistent than Joba Chamberlain, who has been named the 7th inning pitcher by Girardi.  Robertson pitching the 8th seems like a far more reasonable decision, as this saves Soriano's arm and quells his noticeably sour attitude regarding pitching in unfavorable conditions.  To Soriano, pitching in non-pressure situations is tedious and unnecessary.  While this attitude is certainly unacceptable for a professional athlete, in this situation it actually makes sense to bow to Soriano's wishes and not pitch him.  There was no need to bring in your set-up man in a game like this, and ultimately, it cost C.C. a win.