That's the thing, though: this article doesn't say that the NSA did generate the Dual_EC_DRBG constants with a backdoor in mind. It just says that internal memo

That's the thing, though: this article doesn't say that the NSA did generate the Dual_EC_DRBG constants with a backdoor in mind. It just says that internal memos suggest and appear to confirm that they did. That is, the article isn't really anything new.