How can this 'top' command output make sense? Load over 7 and total CPU use ~5%

[Wojciech Puchar]

>     From the glossary (p. 630) of _The_Design_and_Implementation_of_the
> _FreeBSD_Operating_System_ by McKusick and Neville-Neil:
>
> 	load average  A measure of CPU load on the system.  The load average
> 		in FreeBSD is an average of the number of processes ready to
> 		run or waiting for short-term events such as disk I/O to
> 		complete, as sampled once per second over the previous one-
> 		minute interval of system operation.
>
so this glossary should be fixed because it's nonsense.

first - says that it's measure of CPU load
then - "or waiting for short-term events such as disk I/O" - which is NOT 
measure of CPU load.