No, the x86 version anyway is not an iso file that has been rared. The contents of the ISO file were extracted, then compressed into rar file. So when you unrar the files, you literally have the files as if they were extracted from the iso. Digital signatures still intact, so it appears nothing has been tampered with. I will have x64 soon enough -- that is supposedly a rared iso file.
Also, torrents are up on all the usual places
Edit: 64bit is same as x86. Rar contains contents of ISO, but not an actual ISO itself.