I agree. I have an older Macbook Pro from 2010 and none of the Linux drivers, b43 or Broadcom's wl, can get anything better than 17Mbps to my access point. If I boot from Mac OS, I get 70Mbps. They also can't do 4-addr bridging and are missing some other features. Add to that all of the ACPI problems and it makes for a very poor Linux experience.