Does Hibernation run background services that slow down system?

Hello all:

Does Hibernation use any system resources other than the space it reserves
on the hard drive? I know that it saves a file to the hard drive that is the
size of installed RAM, but is it running background services that use up
CPU, RAM or other resources when you are working?

There are many web sites offering tips to speed up Vista, and many of them
include the following statement:
"Windows hibernation background services can use a large amount of system
resources. If you don't use the Hibernate feature on a regular basis you may
want to disable it to give Vista a performance boost."

They offer no documentation of this statement. Is it accurate or not?

So, does Hibernation use any system resources other than the space it
reserves on the hard drive?

Thanks