Apparently the Radeon driver team really hats Battlefield players. The 10.5 Catalyst drivers again increased the load times if you are under Windows 7 or Vista. They have released a hotfix here. It is called 10.5a.

he ATI Catalyst 10.5a Hotfix provides resolution for the following issue:

Battlefield: Bad Company 2 - Long load times for new maps when using a Windows® 7 / Windows Vista® based system with an:
ATI Radeon HD 4xxx series graphics card
ATI Radeon HD 3xxx series graphics card
ATI Radeon HD 2xxx series graphics card