.... We are talking true reference type speakers (with commensurately costly manufacture process) even if the word “reference” is way over used to market nearly every speaker. True reference is not a “silly” concept it is however expensive and very few speakers are built to such a high standard and this is why many low quality manufacturers will warn you that their device needs to settle and break in at your home for up to hundreds of hours.
I’ll agree with you @shadorne that the term REFERENCE is used a bit loosely in the case of audio gear.
In my case, I have Golden Ear Triton *reference* speakers. I certainly knew prior, during and after purchase that in the context of the "absolute pinnacle of best possible performance", the speakers would NOT match a "reference" criteria, despite the use of the word "reference". Same can be said for my Emotiva ERC-3 CD player, which has the label "reference" printed on the face of the unit. However, I would expect "very good to better than very good performance, and exceptional value with respect to what TRUE reference would mean/cost".
The aforementioned stated, neither of two manufacturers recommends any kind of extended break in period. In the case of the speakers, Sandy indicates the crossovers, capacitors and mechanics of the drivers needs a little time to "heal", and we are speaking of approximately (only) 50 hours of usage.
In fact, in the case of the speakers, I have good reason to believe that Golden Ear DID consider a TRUE reference product (speaker), however, "cooler heads prevailed" when they determined that the cost to the consumer would be in the 80K/pair range.