That's something different - it wasn't about driver choice, they always had silly battles for media attention, clearly seen during every winter test.
Edit:
Going back to hiring Raikkonen as a bit of political move by Montezemolo theory: Hulkenberg's management claims in AMUS that they had very advanced talks with Ferrari, contract close to signing in Hungary, two months of negotiations. Even if they are exaggerating a bit timelines fit. It was around that time, in Germany really, it turned out that Ferrari is slow again and won't be competitive in 2013 championship fight, and Red Bull was about it choose Ricciardo.