Typically the lines will be shorter every day, but there will probably be some sort of wait for a few weeks at any store that has inventory. Often, not always, Apple posts a store availability matrix where you can type in your zip code and it will tell you what models and sizes local stores have in stock.
If Apple handles it like they did with last year's mini retina then they could switch to online purchase with in-store pick-up and not allow lines. Mall management hate lines and this is a way to rid them. We'll see if they repeat that process. It worked very well IMHO.