I've noticed the same thing, all posts are 6 or 7 minutes behind my computer's time (which I would say is pretty accurate, within about a minute at least).
Yep, mine too. But my posts are...
edit-6 minutes off.
I've been somewhat curious about this for the last few days. It's nothing too serious, but still, interesting.
Last time I tried to change the server time, it totally screwed up the message board sessions, so if its just a matter of a few minutes, I'd rather just keep things as is.