I think Christy053's reply to me sums it up. He upgraded because "it's free and better". But he has no evidence to back up the latter point, except the claims of MS. Well, they are hardly going to say otherwise are they?
I don't think it's up to us professionals to make case against Vista, it's up to MS and/or Vista itself to make a case in favour - and that just hasn't happened. So whether the router can be sorted or not is neither here no there - without the change to Vista, the problem wouldn't have arisen, and as there is no clear case for the change to Vista, the problem is entirely unnecessary.
In many other postings, I, VHG and others have described explicitly the disadvantages. I have yet to be persuaded that (unless you count see-through borders round windows) there are any TRUE adavantages.