As has been said before, and on the previous page I think, a very reasonable explanation is that Bale would prefer going to Real Madrid if given the chance to do so, but he is also happy to stay at Spurs if he's not given the option to go to Real.
Then coming out saying that he wants to move makes no sense, coming out saying that he wants to stay makes no sense. He could come out and say that he's happy either way, but really the media would just twist that their own way and we would really be getting nowhere.
Levy might be in a similar situation. He might have a number in his head, a number that Baldini and AVB agree with is the amount of money where selling Bale this summer makes sense. If he then states categorically that Bale isn't leaving and Madrid end up making an offer of that much (or more) then he's made himself and the club look a bit silly.
The silence isn't deafening, it's just silence. Compared to what we got from Modric I much prefer this silence. This will keep going, as most of us assumed it would, it will get annoying if you let the media get to you, but that's just the nature of having a top class player at the club being wanted by one of the biggest clubs in the world. I much prefer this to us having mediocre players across the board.