Are those WP's in the hands of customers or still in the sales chanel?The report [1] speaks of sales and actually claims that 42% of the sales are actually coming from feature phone owners (who probably like the price point of the Lumia 520 and all). Retail channels are not feature phone owners ;).
Btw, nu.nl is not a source, really not a source.
Of course it's a source, but you can dispute its reliability. For a substantial part of the Dutch population it is reliable enough to read daily. And it's not as if they have an agenda here.
Tweakers.net is also not a source, too biased (i know you didn't mention tweakers, just sayin').
So, what's the point of dragging Tweakers.net into the discussion?
[1] http://www.kantarworldpanel.com/Global/News/Record-share-for...