Dreams of you all through my head

Is it just me, or are Led Zeppelin slightly out of time at about 45 seconds into Black Dog, as performed on the 4th album? I'm not an expert on this in any way, and keeping time has actually always been my biggest challenge when playing the trumpet. I'm the guy playing right through the pause and missing the cues and playing four quarters in succession all at different lengths. So listen to Black Dog for me, and tell me what you think. I know the song is intentionally complex, but that section of the studio recording seems out of time, even to me, but it could just be that it's way over my head and I simply can't process the complexity of it.

And while we are on the topic of Led Zeppelin, I'd like to conduct an informal survey. This is one of those questions where it's impossible to not have an opinion, and it is essential for every person to know the answer to this question, so that they know who they truly are. On the inside.

Which is you favorite Led Zeppelin album?

And if your answer is something like "I don't know", "I don't care", "I don't have one" or "What cookies?", you better start making up your mind. The answer to this question is more essential than Elvis vs. Beatles and may forever determine your fate, and the fate of the world. I will reveal my favorite, with a detailed explanation, once there are some responses. This is not a threat.