The same guys from Mediatraffic said that it's hard for them to say the exact number of 25 because the sales are so huge and she's selling everywhere. Their estimations are based on a few countries and they guess the rest but the thing with Adele is that you can't guess with her sales.
I think the most shocking thing is how much she sold on Amazon, Google Play, etc. More than many people's first weeks from those (usually) irrelevant sites alone