Not providing sales numbers does, technically, have some advantages, as it keeps one from drawing an exact comparison between two competitors; all we can say with absolute certainty, disregarding educated guesses or estimations, is that the PS4 is definitely outselling the Xbox One, probably by a lot, but that's about it. There is a somewhat clearer picture in the U.S. thanks to NPD links (yay Aquamarine!) but Europe, Asia, etc are a significantly bigger mystery, let alone the global total. The only caveat is that it won't prevent estimates from popping up, like VGChartz, and if the total Xbox One sales numbers are actually higher than any of those estimates, people will basically assume the console is doing worse than it actually is... which would be entirely Microsoft's fault, for not filling in the blanks.
That being said, I'd argue that just because there isn't a discussion on Xbox One sales, doesn't mean gamers in general are any less aware of the fact that it's still being outpaced by the PS4. At this point, though, it's simply become the norm, the expected, quite simply the safe bet, and at this point I think we've also passed the point where there's any perceived means for the Xbox One to turn things around, in terms of 'winning' the gen, or even making the gap any smaller than it currently is.
Beginning of the generation, there were all kinds of talks about what Microsoft could/was going to do to improve Xbox One sales and catch up to the PS4, at least in the U.S. At one point there was that sort of running gag involving a blackboard with all those factors that would 'save' the Xbox One, with them being crossed off one by one, but ultimately these discussions came from a sense that there WAS something Microsoft could do to put the Xbox One back on top. Just increase that sales rate a bit more, drop the Kinect, match the PS4's price, launch in the tier two countries, launch in China, release Halo, a whole list of things that were perceived as being all that was needed to push the Xbox One to the top.
By now, though, all those options have been expended, plus a few that weren't even really expected, like backwards compatibility, or being even cheaper than its competitor, and the PS4 is... still winning. By pretty solid margins in the U.S., at that. So a lot of people just sigh, throw up their hands and say, '...well, guess we'll have to see if things get competitive next generation,' and just like that, the discussion on sales becomes substantially less interesting, because the result is more or less expected. xP
Zanten, Doer Of The Things
Unless He Forgets In Which Case Zanten, Forgetter Of The Things
Or He Procrascinates, In Which Case Zanten, Doer Of The Things Later
Or It Involves Moving Furniture, in Which Case Zanten, F*** You.