In and Out Burger is like anything else... once you had it, it's not a big deal. Not worth waiting in line for 45+ minutes.
I don't know why you guys are saying its a 45 minute wait when its nowhere near that, maybe drive-thru takes a little long but
A. look at the size of that drive thru
B. I go there once a week and never wait more than 15 minutes during lunch, why? well because im not that lazy and get out of my car, and
C. It's a last stop and first stop for many travelers wanting In N out, so why don't you eat somewhere else if you don't have time to hear planes roar by or enjoy a sunny CA afternoon with a burger at hand and LAX traffic overhead.
P.S. Sorry for the rant but this topic is way off topic!