Perhaps an ignorant salesperson or perhaps a knowledgeable technician.
That's what I'm trying to find out...not what the persons first name is.
😉
If it's a sales representative, then on technical aspects I would default to pretty much ignore whatever they say. Nothing against sales reps, but when it comes to technical subjects most are pretty clueless, even at boutiques. There are obviously exceptions, but most sales people for watches that I have ever dealt with were not well versed in the products from a technical perspective, and to sell watches they really don't need to be.
Regarding the person in the white coat, I would assume that is either a boutique technician, or possibly a boutique watchmaker. Note that there is a very big difference between those two. The boutique watchmaker will be a formally trained watchmaker (capable of doing a full service, repairs, etc.), where the boutique technician will be someone off the street (or someone selected from the sales force) and given a 6 week training program. They are restricted to doing very minor repairs, with simple regulation being the most difficult thing they will tackle, and only if the delta falls within certain parameters since they really don't do any adjusting.
As for what Omega is telling their people to say, well I don't think either of us can prove one way or another what that is or where this information comes from. What I can tell you is that in all the formal education and training I have had (including co-axial training at Omega) the subject of "break in" as it's known on watch forums was never discussed. We were never told that you set the watch to run fast because over time it will "break in" and slow down. I would find it odd that something so universally accepted by some was never discussed in watchmaking school or any brand training I have ever attended.
As I've told the OP in the other thread he started about his watch on that other forum, there is a very short period where things like balance amplitudes and rates can change just after a watch is serviced, but this is more like 12 to 24 hours, not days, weeks, or months.
Again I'm quite willing to listen to any well reasoned technical argument to explain this phenomenon, but "the guy in the white coat at the boutique said so" is not particularly well reasoned, at least for me.
😀
Cheers, Al