All I'll say is, don't believe everything you read on the internet.
When companies like Sony lie on quarterly reports the person who lies and/or the people who order them to lie get fined or go to jail. A random PR guy for Sony doing an interview with Total Biscuit says they've outsold the XO by 50million in one quarter, you take that with a pinch of salt. When companies on the stock market who have a legal liability to tell the truth in reports say "we've sold 13.5million ps4's" you can pretty much count on the fact that they've sold 13.5million PS4's.
Tesco's recently fired several director level people for fudging their legally released numbers, and Tesco's and those people are now being investigated in a very serious way with pretty severe potential consequences. It does prove these guys do lie, sometimes, but more often than not they don't.
When MS have a product selling like crap... they go into spin overdrive and hide numbers like crazy, Surface, Windows 7/8, it's not new. When something sells well they are self congratulatory, when something doesn't sell well they go into number obscuring mode.
We have an upper limit on XO sales, which is only about 1-1.5mil more than they've estimated and would require no 360 sales which is extremely unlikely. That they are bundling the numbers, obscuring the real sales I think it's not out of line to assume the sales aren't great.
Things look even worse in general when you factor in the sales since people knew about the differences. Most users saw the specs and didn't know what they were looking at and even those that did(the minority) couldn't be sure the PS4 wouldn't just crash constantly, have a crap API and be 30% slower than it is, or that dev's wouldn't just make a single res/framerate and stick with it. The launch buyers(around 2mil each in the first batches) bought almost entirely on pre-order and with very little first hand knowledge available.
Sales since then are based mostly on reviews, reviewers experience/comparisons of consoles, comparisons of multiplatform titles, etc.
Since we've had broad knowledge of both consoles MS has sold effectively 4.5mil while Sony has sold 11.5mil or over two and a half times as many consoles.