I flew IST-LAX in late February. I was in comfort class,the plane left IST only about 30 minutes late, in LAX I was the first few off plane, and cleared customs, immigration in under 10 minutes. but the lines were very short. this is not the norm for LAX. one day can be a half hour the next 1.5 hours. The big time saver is having just carry on luggage. luggage can delay u from a half hour to an hour plus. On a rt HKG=IST=LAX Turkish air never looked at my carry on nor weighed it. lots of overhead space on plane.