I will weigh in here and say I do know that my agent doesn't necessarily keep me informed of every little step along the way, so it may well be that the houses have been keeping her updated even though she isn't passing each and every little detail of the process on to me. This doesn't necessarily mean anything negative; it's just the general policy of the agency. They have a lot of clients and can't be slowed down by giving daily reports to every single author unless it looks like an actual, bona-fide offer is imminent. So it could well be that the silence on my end isn't necessarily no news at all, but just not something that can be construed as an offer yet.
Both explanations make sense to me. But of course I want to think positive and hope that maybe "no news is good news." However, my agent and I have already discussed the possibility of a shorter rewrite, which may in the end be what it takes to make the sell. The length, from what I'm gathering, seems to be the biggest drawback, based on the feedback already received.
However, one thing that may lend credence to what begbie's agent has said is this: If a novel is, in fact, taking an inordinate amount of time to move through the process, it no doubt may mean the book has several major hurdles it's having to clear. I can see where this could potenially bode ill. It may mean there are people in-house fighting for it, but having to do some major battles. I would imagine a anonymous decision would go much more smoothly and quickly, but that's just my guess. In the end, it may depend on how much clout the editors doing the fighting have and how good of a case they can make for it.