I get around 35ish FPS out in the open when running with grass on medium, all shadows turned off at 1080p all the other details are on High and no AA.

Display Resolution 1920 x 1080
Graphics Memory Capacity 1 GB
Graphics Controller Manufacturer nVIDIA
Graphics Controller Model GeForce GTS 360M
Memory Technology DDR3 SDRAM
Memory 8 GB
Memory Standard DDR3-1066/PC3-8500
Processor Model i7-720QM
Processor Speed 1.60 GHz
Processor Core Quad-core
Processor Type Core i7
Cache 6 MB