-v has nothing to do with quiet-build. You want to use --quiet-build=N. Also, emerge parallelization depends on the -j (--jobs) option, you should use emerge --jobs N <other_options> <atoms>. In your case, a -j7 should do the trick.
- [gentoo-user] --jobs Harry Putnam
- Re: [gentoo-user] --jobs Alan McKinnon
- [gentoo-user] Re: --jobs Harry Putnam
- Re: [gentoo-user] Re: --jobs Paul Hartman
- [gentoo-user] Re: --jobs Harry Putnam
- Re: [gentoo-user] Re: --jobs Neil Bothwick
- Re: [gentoo-user] Re: --jobs Claudio Roberto França Pereira
- Re: [gentoo-user] Re: --jobs Dale
- Re: [gentoo-user] --jobs Paul Hartman
- [gentoo-user] Re: --jobs Harry Putnam