Conclusion: they all speculate as wildly as we do!
Yup. I'd go along with that. Perhaps somebody who's worked for Apple can confirm but I don't think they're generally privy to any insider info.
I think the insider knowledge posted in these forums that comes from chats with Apple employees is often just speculation.
I remember calling my local store just after the release of the first iPod Nano and they had no idea what i was talking about. They kept me on hold while they checked the net and I could hear them saying "Wow, look at that thing" in the background... or words to that effect.