I can't guarantee that it would be 10x faster, but it would definitely improve. The difference in rendering speed will vary from project to project. You should see if you can load the project on a 'loaner' Mac Pro and try rendering it.
When I say 'instance' I mean another instance of the renderer running the background (the 'render multiple frames simultaneously' option in AE). Each instance of the renderer can address 3GB of RAM, and the number of instances is limited by the number of cores (dual core Mac Book Pro can have 2 instances, 8 core Mac Pro with hyperthreading could have 16 instances).
Here's a link to more information on multi-processing:
http://help.adobe.com/en_US/AfterEffects/9.0/WSDD65B476-971A-48e9-A5FD-D90E...
Darby Edelen
