You know, for years I thought Grayson did the voice-over on that Disney record (we wore it out something like 30 years ago, I swear). But I recently purchased a copy from eBay and gave it a listen. It doesn't sound at all like Grayson! Are you sure your roommate received a letter from Disney veryifying that? I'm listening to it right now, and while the voice has the same timbre, the wordings and cadence are completely different. The actress doing this voice-over is someone I recognize from early Disney offerings, like "The Wonderful World of Color," his TV show from the early 60's.
I'm quite familiar with Grayson's speaking voice, having heard it multiple times on DS and in NOTI, not to mention Gargoyles, etc. If you have the Disney record, give it a lesson. I'm positive you'll know that isn't Grayson, and her involvement in the project is nothing more than an urban legend.
Rod