What I was saying was that there is a world of difference between a wishy-washy statement of "I guess" and an explicit "I believe".
Firstly, when it comes to kernel testing, no news is usually good news. But it's never a sure thing, and it's hard for one person to test it all.
Second, the newest kernel release is usually considered "bleeding edge", at least as far as enterprise goes. It's never a sure thing. Implying it's a sure thing and will for sure not catch your datacenter on fire is probably a Bad Idea.
Thirdly, who cares if Linus says "guess" or "believe". Both translate to exactly the same thing to me, given the context: "I'm pretty sure this is ok, but don't use this until you've backed up your important cat pictures." It's well known he's a bit bunt. Shit man, just be happy he didn't insult your mother in the header.