I know nothing about McCormack, but on the basis that both Leeds and Fulham have signed him to push them into the play offs and failed miserably, I suspect he's as much the answer as Darren Bent was for Spurs.
Even if we're talking about a year to consolidate and his goals kept us comfortable, at the prices being talked about it's stupid business of the sort that meant we were never going to get a second chance under Lerner.