As someone who has always believed in speaker break in only because every moving object wears at some level thus changing its characteristics not because of testing and various study results. I have often wondered just how much impact the break-in has on sonics of a speaker system. Is it really audiable? I haven't had the pleasure of owning a set of speakers from new, just drivers for my own homebuilt projects, yet haven't heard anything to write home about after a few hours/days of use.
Now I know my ears aren't that bad, I manage to score all the difficult audio engineering jobs like multi sophited churches with bucket loads of big brick pillars, or engineering the local charity concert in a stage theatre from a room 99% detached from the auditorium

. although I am no professional, I never seem to detect enough of change in sonics to warrant the worry about it.
What are other peoples thoughts on the perceptability of this?