There is a whiff of a double standard in that Gilroy and Zebo did not make the initial squad due to lack of gametime while McFadden did. Was McFadden notably better in the Wolfhounds game? No, although it was Zebo who got up, stood pillar at that last ruck, then wandered off to line up Freddie Burns for his howler of the season moment. It appears as though he may be willing to overlook issues of match fitness in Leinster players which he won't in other players. May. Maybe McFadden's injury allowed him to keep fit more so than other players. Maybe Schmidt is unhappy with the way Zebo is doing some of his basics and wants him to brush up on them. We don't know.
edit: Given all I've heard about Fitzgerald as a potential heir to BOD, I'd have thought the McFadden as centre cover argument a little lacking in legs.
What we do know is the situation in Irish rugby is such that it is a very natural reaction to suspect bias. It adds extra pressure on Schmidt to perform.
The squad
Best, Cronin
Healy, McGrath, Ross, Moore
POC, Toner, McCarthy, Tuohy, Henderson
Heaslip, Henry, POM, TOD, Copeland, Ruddock, Murphy
Murray, Reddan
Sexton, Jackson
BOD, D'Arcy, Marshall, Cave, Henshaw
Fitzgerald, McFadden, Kearney D, Trimble
Kearney R, Jones
Forgotten whether Madigan made it.