Is it normal for the baby to keep completely different activity / sleep cycles in the womb than they would in real life?

I find I have minimal activity during the day... but from about 6pm on its like Studio 54 in there. Even if I wake up around 4 or 5 am - its still party time for my little bean. But beginning with my drive to work - its snoozeville.

Is that typical, or am I in for many sleepless nights. I'm not complaining - I was just wondering what everyone else feels.