Yes I believe you are right.
I actually just have downloaded this short together with a Incredibles Teaser Trailer (which actually contains some scenes not featured in the movie itself).
It just said it was Incredibles extras from dvd, but it seems it's not.
I think Gone Nutty is from Ice Age extras.

http://en.wikipedia.org/wiki/Gone_Nutty
http://www.imdb.com/title/tt0342965/


Arcam AVR600
Cambridge Audio 640C v2
Oppo DV-980H
PMC GB1i
PMC DB1M-Ci
QS8 v2
EP350 v3