Microsoft has now released a Hotfix for Operating System Deployment in SCCM 2012R2. I downloaded it and installed the patch and everything has speeded up again. Here is the link http://support.microsoft.com/kb/2905002/en-us
Firstly can I say I love this website, it has helped me out lots of times, I've never had official SCCM training and I've implemented and support SCCM at my college, with great help from here! The problem I'm having now is since I've upgraded to SCCM 2012R2 its extremely slow at downloading images when deploying an OS to a computer. It was working fine on SCCM 2012 SP1. The SCCM Server is running on VMware 5.1 and is using the VMXNET 3 network card. Hope someone can help. Thank you.