It could just be a hiccup related to the kernel.
Once you have updated your system, I would doubt that it will occur again.
I am not sure if this is what you mean, but I did use yum to update the system, I think it was something like #yum -y update or somthing "now that my connection is fine", rebooted, but I still see the error about udev [failed] happening.
after I stopped cupfreq and bluetooth under system-config-services, then rebooted, the udev started [ok], but the next boot it again timed out and [failed],
how can one increase the timeout for udev at boot time?