OS WIM file downloads during Setup Windows and ConfigMgr

Let me start by saying, this is not the same issue as this post ;-)

http://social.technet.microsoft.com/Forums/en-US/configmgrosd/thread/58610c01-97b9-476e-9a22-fc0e31033de5

I decided to test the option in 2012 for "Apply Operating System" that allows you to run from DP (Windows 8 image).  The overall Task Sequence is set to download and execute so wanted to test how much time it would save to run the Apply OS phase from the DP.  Well it didn't save any time as the step "Setup Windows and ConfigMgr" downloaded the WIM file prior to downloading the SCCM Client install files.

I double checked the source paths for my Client Package and my OS package and they do not contain one others code in them so unlike the post above its not a package source issue.

Has anyone else tried using the check box for run from DP only for apply OS?  Curious if this behavior happens even without the check box and it just goes right past it and download the client files since the WIM already exists from the Apply OS phase..

When the build completes I'll start digging through log files to see if there are any clues..

Thoughts?

Thanks,
William