OpenCL works with Lion vs SL a bit faster. For my 9600 GT its not much diff, only a few like OceanWave run significant faster.
The faster the gpu the more benefit by newer Lion OPenCL Framework/Driver.
LUXMARK, an well known OpenCL raytraycing benchmark (AMD uses it itself for tests / benchmarks) is available in an V2.0 version.
Also the resuts database was updated (LUXMARK can submit results).
DL: Mac OS X 64 Bit: LUXMARK V2 OS X
Results DB (you can also use new searcg funktion to select OS , GPU type, for narrowing shown results)
LUXMARK V2 results DB
You will find real Macs and, if GPU TYPE is Fermi (GTX 4/5xx) hackintoshs Fermi gpu users need, as someone told already an patch (few bytes hex) to get OpenCL run.
Because no AMD 7xxx GPU possible (even for Hackintoshs) , fastest OpenCL GPus are Nvidia Fermi at this time.
Some results i collected : Luxmark V2 , gpu only, default Scene SALA (medium)
AMD 7970 (Win!) = 1800
Nvidia GTX 580 (“MSI Ligtning”) = 1230
Nvidia GTX 560 = 620
MacPro AMD Radeon 5870 Mac = 588
AMD Radeon HIS 6870 OS X 10.7.2 = 484
MacPro AMD Radeon 5770 Mac = 306
AMD Sapphire 6850 = 351
AMD Radeon 5770 = 315
AMD Radeon 4850 = 224
Nvidia GTS 240 *2 = 191
AMD Radeon 4830, OS X 10.7.2 = 151
iMac AMD Radeon 6750M = 151
Geforce 9800GT 512 MB = 78
9600 GT , OS X 10.7.3 = 77