Answer: No, or not yet. Apple tested Intel and AMD hardware for OSX, and not portable devices. Sorry for the false rumour; I’ll keep you posted.
Update: It seems that OpenCL is on iOS, but only available to system-libraries and not for apps (directly). That explains part of the responsiveness of the system.
At the thirteenth of August 2011 Apple askked the Khronosgroup to test 7 unknown devices if they are conformant with OpenCL 1.1. As Apple uses OpenCL-conformant hardware by AMD, NVidia and Intel in their desktops, the first conclusion is that they have been testing their iOS-devices. A quick look at the list of available iOS devices for iOS 5 capable devices gives the following potential candidates:
- iPhone 3GS
- iPhone 4
- iPhone 5
- iPad 2
- iPod Touch 4th generation
- Apple TV