I don't believe them for a minute. Hamilton is still in negotiation with Merc, and though they both still say it's just the details, money is often in the details.
When Arrivabene was talking to Eddie, it didn't sound for a second that Ferrari were thinking about getting rid of Kimi, more that he should simply show Ferrari what he wants to do. A little different than the article below is intoning.
Look, if Vettel performs the way he has been so far this season, then why would Ferrari want Hamilton to come along and ruffle feathers? Once their car is outperforming the Mercs regularly, Kimi will be as strong a number 2 as they need. Besides, I wouldn't hire two 'old' guys if I was Ferrari, time for some new blood. Look back at the midfield for someone who performs all season. A lot cheaper too.
http://www.gptoday.com/full_story/view/522607/Rumours_linking_Hamilton_move_to_Ferrari/