Why are you so invested in the sales figures anyways...are you not just a consumer or do you have a vested interest in the success of Microsoft PC sales?
This begs the question--Who cares? In the coming years everyone will be making surfaces...microsoft just came with it first.
I understand why she posts this and pays attention to things such as sales. As a user of the surface (both 1 and 3), I care about sales figures. Maybe not the specific numbers, but the fact that its either selling good or like crap. As that affects me, as a consumer. If surface pro is really selling like crap, or sales are horrible, then the likelihood that all things surface will diminish is greater. If MS isn't selling many, their resources for the SP 'project' will/are likely to diminish as well. Yet if the SP 'project' is selling nicely, or even better and its selling awesomely. Then I as a consumer, can except full resourced and many new/interesting features/accessories/updates/new generations to follow.
I for one, love my surface pro. And it really would be a shame if it wasn't selling good, as then the likelihood that this 'project' will continue and in full force is highly unlikely. If its selling alright, then I can expect the project to continue, but at a slower pace and probably less accessories and slower updates. Yet if its got just great sales, I can expect fast updates, new/great accessories, great product support, ect.
Sales figures say it all to everyone. Shareholders, executives, managers, employees, market managers, sales/store's, and consumers. Bad sales, bad for everyone, good sales, good for everyone, great sales great for everyone.