The MLB video of this play has a section of audio from the conversation of manager Mike Matheny and PU John Hirschbeck (starting at 1:58). To summarize:

John Hirschbeck: "There's five of us out here, ok. And all five of us say we are 100% sure that that was not a catch. Our job is to get it right."

Mike Matheny: "But how many...![cut off]"

Many of the comments I have read/heard from people (even the various announcers) commenting on this play say "that call never gets overturned". And I would wager Mike Matheny is saying the same thing before the audio in the above clip gets cut off. Disregarding the legitimacy of these peoples opinions regarding baseball umpiring, is there any shred of truth to this belief?