ifsknt your previous post is incorrect on a number of counts.
Primarily the point that the economy passengers disembark at the same time as the business class passengers.
With a three door operation, the first door open is M1L and the first class passengers disembark. the second door opened is the U1L where the JC pax and the WC pax disembark. Then after the upper deck is cleared and the vesibule cleared the M2L is opened and the YC pax disembark.
the line in LAX has nothing to do with the disembarkation process, its about the **** fight that is known as Tom Bradley terminal and the incompetent US immigration process.
The JC pax are more likely caught behind a dozen other airlines that arrive at the same time.
And the fact that you dont like the configuration is not inconsistent with some pax comments, however 95% plus like the spacious feel and the lie flat beds that they are completely in control of, unlike the SQ ones that have to be put into a bed position and returned upright by a crew member