I like the Dreamworks comparison better. It also would have been more funnier with "let's use a celebrity's voice".
Sure, Disney's creative process was and is kind of different from Pixar. Although it is clear from the recent two Walt Disney Animation Studios (WDAS) movies that John Lasseter is starting to leave his mark on the studio.
The problem I have with the animals pics in the Disney picture is that most of them are live-action films, which are of course not produced by WDAS. And Valiant wasn't produced by WDAS.
But if Pixar made live action films (although Brad Bird and Andrew Stanton will be working on live-action films as their next projects), they would definitely make films just as good as their animated films.