In my experience, whatever "creases" that may be left over from the way your jeans were folded should disappear fairly quickly. After a week or two, probably. Certainly not something to worry about, and they'll be long gone by the time you wash. I got my first pair of new standards last week and I'm wondering how long before the creases down the sides should start disappearing with regular wear? I've been wearing them every day for ~5 days now and I can still see the creases when I take them off. I guess I'm just afraid that when I do finally soak them the creases will show.