[gentoo-user] --jobs is ignored for unmerging?

[Nikos Chantziaras]

I recently needed to unmerge Netbeans and KDE from a machine. So removed 
the top-level packages of those, and then ran:

  emerge -a --depclean --jobs 20
However, "--jobs" is being ignored. So I'm sitting there, watching 
hundreds of packages being unmerged one by one, taking a long time :-/

Is this normal? Shouldn't the --jobs option result in emerge unmerging 
multiple packages at the same time?