I dont really see why any deal couldnt be kept hush, you have about three people our side who would know and three or four that side, it wouldnt be that hard for those people to act in secret. Big multi nationals hold meetings all the time with ideas of take overs and they are kept secret and the business press also have lots of contacts within industry, football isnt the only business where rumour is reported.
Whether Moyes is coming or not I just dont think its too fanciful to think this has been done under the radar of a few idiot journalists who spout crap at any given opportunity.