Well, I see nothing wrong with how Todd responded. I see nothing wrong with him not wanting to say. He's likely annoyed by all the posts/comments asking that very same question, when he said all he could or all he wants to say. The way I can tell is him starting with "for the 100th time." Yet fans still ask about the drummer situation and wheter Scotts out.
They have no obligation to tell us at all. They could release the album with no credits, then no one will know.
You are 100 percent correct. They have absolutely no obligation whatsoever. And I don't blame Todd for getting annoyed. I think my point is, the annoyance could be avoided, and fans could be placated, if he stopped sidestepping the question. He dances around it.
If he just said "so and so is playing on the record," or "hey, yeah, I know you guys are really concerned about who is drumming, but for various behind the scenes reasons, we can't say anything yet," it would help to an extent. But they continue to try and avoid it, instead of just answering the question.
Honestly, I don't think anyone would care TOO much, if he said:
"Hey, yeah, I know you all are frustrated with the whole drumming question. We just can't say anything yet about it. I know that sucks, but our hands are tied at the moment. Please be patient with us, and as soon as we can say what is up, we will."
>>>At least then they are tackling it head-on, instead of just avoiding it.
Edit - my guess, based on it all, and Todd saying it wasn't Casey on the album, is that Todd tracked the drums, and they want to avoid anyone knowing that until the album drops, to avoid any potential hit to the record's first week sales. Hate to break it to him, but that never works.