I can't help, but I can confirm it. I see it on my Linux Certified laptop, which is some kind of Asus repackage job. I see system load spike as high as 15 or so for a few seconds and then it ramps back down to normal after a few more seconds. I've always assumed (I know, I know) that it was just some housekeeping involved with the recovery from hibernate.
I observe the same with my Lenovo X60 tablet. I also assumed it was normal. - Chris