There's information here about OpenCL processing and other GPU acceleration in Premiere Pro CS6:
http://adobe.ly/Je20M2
Note the part toward the end about how updating software now or in the near future is the best way to get the best performance and stability with OpenCL in Premiere Pro CS6.
We can't make promises about the future, but... well, stay tuned.
---------------------------------------------------------------------------------------------------------
Todd Kopriva, Adobe Systems Incorporated
product manager, professional video software
After Effects team blog
Premiere Pro team blog
---------------------------------------------------------------------------------------------------------
