I've found the following table of values for the tcp tos flag in this 
m0n0wall mailing list post:

http://m0n0.ch/wall/list/showmsg.php?id=75/79
> From the RFC:				Corresponding Hex
> 1000   --   minimize delay		0x8
> 0100   --   maximize throughput		0x4
> 0010   --   maximize reliability	0x2
> 0001   --   minimize monetary cost	0x1
> 0000   --   normal service		0x0
Shouldn't maximize throughput have 0x08 as its correct value?