There is a simpler reason. The biggest blog of web/apps in Spain (http://www.genbeta.com) has written several articles about Bitcoin this week so there have been more downloads thanks to that.
and not only technical blogs have written about bitcoin. also more general-interest newspapers have recently published articles about it.
and also it turns out that this article only speaks about the apps downloads but not about how much money has been exchanged, so imho it's a little bit unfair to speak about correlations or capital flight as others articles suggested