Glad to know you notice as well and it's not related to only particular systems.
I've also found the issue and posted the question in FreeBSD 8.1 installing through ports.
I've tried upgrading some ports without succes.
The timing seems to be such a clear clue.
It's exactly 3 seconds. (I timed 10 in 30 seconds with my watch, that's exact enough for me)
Too bad my knowledge of the ports and BSD in general is too limited at the moment.
Haven't got a clue myself where to look and what to look for.
A base install of PCBSD is easy enough but I'm still struggeling trying to get FreeBSD working well. Yes I read and even printed parts of the handbook. Right now I need to cut down on my BSD time, it's very interesting but also taking too much of my time!
Currently I'm using fbpanel, that also seems to be working quite well.