my laptop has a broadcom chip that supports afterburn wich i think is the same thing as speedbooster. i also have a pc with a wirless g usb running from my wr54gs. by mixing g with gs will the router default to g only mode.
Yes, the Speedbooster technology is based off the Afterburner technology. You should have the router in a default "mixed" mode so that the laptop will have the GS speeds and the PC will have the G speeds...
Mixed mode is for users with 11b hardware. As you know 11b is a huge bottle neck. So rejecting all 11b devices keeps the speed set on HI, so 11g works better.