The VCP5 exam I completed told me that VMware wanted to alter the direction of questions from VCP4 to VCP5. It seemed to me that they paid more attention to using the vSphere, vCenter, etc products rather than knowing statistics about them. I suggest using the study material I came across listed below. In the end, actually working with vSphere and vCenter’s features will be your biggest advantage and help you the most!
Vidad Cosonok’s Exam Cram – Excellent!
VMware Official Guides
vSphere Networking Guide – Especially the vDS