Hey
My machine shut off randomly (or went into standby rather) but when I started it back up HFS still said it had been running for 1 day and 3 hours. This is a nice thing to know since some people shoot for 99.9% uptime and even though the server is unaccessible because the ability to route is shut down it still keeps the server online time valid. So you can go into standby and come back and itll still say its been online all that time.. I tested this on GiantEagles end as well after clearing cache etc. (Both firefox and IE).
Have not tested with Hibernate because my graphics card doesnt support it, I would image with hibernate it resets it, but maybe that value only sees how long HFS has been running, and not how long HFS has been running with the interwebs enabled, Rejetto, care to shed some light on this/
-Kurt