I dunno though... That discussion and threat have been an ongoing issue since 1978-9 or so, when Stairway first got popular... I was a Spirit fan too, especially "Mister Skin", but "Stairway..." and "Taurus" while similar, are not quite the same. Taurus is like an intro to another song, while Stairway is a whole song. Zep should have probably found out who actually did the writing of that Taurus guitar part (Randy California, Jay Ferguson??), and given them at least a mention and a small percentage cut. It could be also, that Page was noodling with something, and showed California what he had, mentioning that he was stuck, and didn't know what to do after the 4th chord... The first 4 chords used are identical, with the dropping bass note going down a half step at a time. Folks "cop" things from everyone when writing music, and do things to cover-up the similarities. They might end up having to pay a "fine" or "damages", maybe getting a royalty cut, similar to the folks who have "sampled" directly from songs... But then again, this ain't the first time the Zep has been accused of this. The thing is, even John Fogerty was sued over The Old Man Down The Road, when someone accused him of stealing from Run Through The Jungle, which was written by John Fogerty, of all people. He actually brought a guitar into the court room, and showed the jury the differences between the songs. He made the statement "Of course I copied from myself!"