http://www.audioholics.com/education/loudspeaker-basics/speaker-break-in-fact-or-fiction
Please read the above article before believing that nonsense. Furthermore unless something has verified something scientificly in the audio field don't believe them. It saves time and money.
What is Break-In?
Break-in is generally the time it takes for you to tolerate the imperfections of your speakers. For example now that I've listened to my speakers for over 2 months I enjoy them far more than I did the third time I listened to them. I built them myself so I discount the first two times as the joy of being done.
Most people will never buy or build reference speakers because it's a lot of work or money. So get used to the fact you will need to give yourself time to adjust to your speakers.
IOTW Your speakers are your master and you are their puppy.
How to break in your speakers
The best way to break in speakers is to watch your favorite movies and listen to your favorite music while drinking your favorite beverage. 
While playing them 24/7 might keep burglars out I'd be very concerned about continously using your voice coils that long. You don't want to wear out your speakers too early.
Finally you need a new place to shop. Salesman spoutting those kinds of things will steer you the wrong direction.
Oh yeah get off the forum and back to listening!!