Yep. The blog post above is what I used to setup my Pro Res workflow. Works great!
After researching, I think there is a bug in CS6 that prevents the previews from working. Another online user found a workaround that I’ve been able to use to make it work.
I’ll include the link here, but repeat the advice. https://forums.adobe.com/thread/1039888
According to his updates this bug isn’t fixed until CC 2014.
1) Render previews as you go set to the same codec as your sequence codec, in my case, Pro Res LT.
2) Use Mercury Playback engine set to CUDA if you have a CUDA card.
3) When finished with your project and ready to export, go to Project > Project settings
4) Turn Mercury Playback engine to Software only. When asked whether you want to keep previews, say YES. (This means you are keeping the previews created while you had it set to CUDA.
5) Now export.
In my case, the export went from 5 minutes (meaning it was re-rendering the entire sequence) to 40 seconds.