TANGENT:
I find these assertions pretty well divorced from reality. At best, the cynicism dial is turned to 11. Slamming the totality of the private sector is absurd. Business plans change, executive management changes, markets change. Just because something changes doesn't mean that the original statement wasn't truthful when it was made.
Your second paragraph is a bit more reasonable, but even it is a back-handed assertion - or at best laced with cynicism.
The kind of absurdity you stated above would be comparable to me assuming that you'd have to be making that claim while safely sequestered in the halls of academia or government.... (And many would claim that if that were true, the whole "divorced from reality" thing becomes an understandable event.

)
End-of-tangent.
Back to the topic at hand:While I'm no fan of 4e nor of WotC's current business model, I don't think they're outright lying to their customers. The rumor seems baseless. Even if it were true, IF WotC is experiencing tough economic circumstances and D&D isn't performing as hoped/expected, they'd be stupid (and I'd say irresponsible) not to modify their business plan, even if that meant it invalidated statements made in prior years. After all, those faceless corporate lemmings are employees that have lives, families, & bills to pay. Presumably, as gamers and as decent human beings, we'd like to see them gainfully employed....
....even if they're working for one of those lying, stealing, cheating, #$#%#%#$#%@#%#% corporations.