Yes - sometimes several trucks a day
While I know the IP6/6+ (particularly the latter) are constrained by production problems etc., there will be iPhones produced all the time and stores will receive them regularly. Last year, I wandered up to a store about 2pm on release day, and they had sold out of their morning inventory but just had another truck arrive and I walked out with exactly what I wanted (iP5S space gray AT&T 64F) etc. I don't know what the situation will be this time, but deliveries of pre-orders will be constrained but stores will get them.