Yeah, I usually just hold off for a couple hours before I bother if I'm still on that late... otherwise I just wait until traffic is down and do it following afternoon lol there's no rush, it's not like the maps will be in main rotation (other than an Onslaught moshpit lobby) for at least a month anyway... unless IW and Neversoft decided to copy the Treyarch logic and integrate them on release day...
I don't expect that lol