Yeah, I had to read the “bug” or “flaw” part twice to be sure they're not saying it isn't a bug or flaw, they're only saying it isn't unique to Intel.
And then as you say, they immediately mention AMD to imply that everyone has the issue, but they also avoid actually saying that.
Your excellent analysis of what they're really saying reminds me of user thaumaturgy's analysis of Adancing Our Amazing Bet[1].