I wouldn't trust the IMDB too much, since they get information wrong sometimes.
UCLA Film & TV Archive's online database
listing for their circa-1961 dye-transfer 35mm print:
I'm a bit let down that Disney continues to make their Platinum Edition releases so fluffy on supplemental content. Peter Pan didn't have much interesting content besides a commentary, a very short "making of" featurette, and some deleted scene material. This at least seems to be a little better, but I think just getting some animators and historians together would allow for a great commentary. WB does this with their animation, anyways.