I think the issue stems from the fact that Wiggins, on some kind of winning high right after the TDF, said he would help Froome win the TDF and ride for him.
Now, he is saying, the racing will determine it. Which isn't exactly incorrect. Froome might crash out or something, who knows, and the first week the last 5-7 years has been a complete crashfest and disaster for some riders. Froome isn't immune.
So in that respect, although Wiggins might say he will support him, it really will take at least the first week of racing and get everyone through safely to then say, hey, Froome is the leader.
I must say, Froome has been very vocal and started this whole thing as of late proclaiming he is the TDF leader this year. Then Wiggins makes a statement, and now Froome is releasing more stuff saying he is....
But, sorry to say about Froome. I think he is just trying to garner public support with these statements in the media. Because the people that really decide, team management, haven't said a single word as to who the leader is. They will say and determine the leader, not Froome. If Froome isn't the leader, what is he going to do? Not race hard? Quit? Yeah, good luck finding a new job not working with other people in the cycling biz.
So at this point, Froome might just be full of crap and trying to manipulate a team leader role in the media/press/public.