Absolutely! DS goes to bed at 7 or 8, and I'm down with him. I don't get to take naps with him because I WOH full-time. I do feel sad that once I get home we only have 3 to 4 hours of good play time, but I figure the nightly snuggles help make up for some of that, plus we have the weekends.
Anyway, I think that having a baby is exhausting, we don't actually sleep 10 hours straight, we get up at 2 for a nursing session and lately it takes us both a few minutes to get back to sleep again after DS eats.
I figure you might as well go with what your body is telling you to do, so I just sleep when I can.