bbcp is becoming a hot contender to rsync. Unfortunately, it’s not available by default in Ubuntu 12.04. The steps below will get you going with it. Note that bbcp needs to be installed at both ends of a transfer.
apt-get -y install build-essential zlib1g-dev libssl-dev
tar xvfz bbcp.tgz
mv ../bin/*/bbcp /usr/local/bin/