Timing will be "aligned" as long as the two speakers are equal distance to the ears. There really is no other alignment. Most of it is a balancing act between direct/reflected, and shadowing function of the head to the other ear. The first heavily impacted by speaker and room, the second by speaker, and angle.
This is correct. More people should know this. Save a huge amount of time. Unbelievable amount of time. One particularly clueless individual thinks there is just no way speakers can be set up in 10 minutes.
Reality check. Those who follow my posts will know this. I'm at CES, yes the Consumer Electronics Show. Vendor pass, Talon Audio room. They are just not getting the sound they want. Full hour at least tweaking this way, tweaking that. Sounds good but the image just isn't "locked in". Was my first time there so trying to fly on the wall it until it gets to where they are out of ideas and ready for anything from anyone.
Do you have a tape measure? Yes. Do you have a string or something we can use for a straight line? Yes. So we stretch the string, put the speakers on that line, measure to the middle of the string, run another one at 90 degrees, double-check speakers are equidistant from that point. Done. Not even 10 minutes. Beautiful imaging. Everyone happy.
Done it many times, many different systems, many different rooms. It just ain't that hard folks.