Red Bull/Merc deal delay due to 'McLaren problem'

Remeber some time ago when Bernie Ecclestone wanted one supplyer for all the cars in F1 and teams like Ferrari said they would leave F1. Well now it seems hes doing it anyway there is a rumours that all new teams requirement was a Cosworth engine contracts be signed. And all 4 of the new team have a signed contract with cosworth.If Red Bull and Williams join then it will be 6 teams, this make you wonder. Other thing is there is a engine freeze so cosworth would basicly be running its spec 2006 engine and that was rubbish as it blew out all the time if you remeber.