PCLinuxOS uses LO manager script for downloading libreoffice directly from download.documentfoundation.org and then installs it for you . Somehow the default mirror for libreoffice has a snail walk like speed and it becomes painful to install libreoffice from it .
I followed these steps to change the mirror to a faster one for me .
1 ) Open the script file called lomanager located in /usr/bin as a superuser mode in a text editor
2 ) Located line 93 and change it from default to this one as shown here
Default line 93
httpsource="http://download.documentfoundation.org/libreoffice/stable/3.4.3/rpm/"$sysarchdir"/" # http-source
Change it to
httpsource="http://ftp.heanet.ie/mirrors/tdf/libreoffice/stable/3.4.3/rpm/"$sysarchdir"/" # http-source
Save , exit and reload LO manager.
You can choose mirror that works faster for you as in my case ftp.heanet.ie always works perfect for me .