We all know that in F1 there is no smoke without a fire somewhere.
Usually its Dismissial, that leads to denial, then strong denial, then ok we have talked, then it becomes we are open to all is posible, the we are happy with status quo, the heres a deal you never thought that would happen.
Lets face it, it will be happening. And i doubt that McLaren will see their Merceded deal out, i can see them with a rather heavy and underpowered RA808E powerplant for 2013 and a good Honda powerplant for 2014.
I think it will happen, they are at the dismissial/denial stage at present.