Barracuda,
I really do hope your Accumark lives up to your expectations and then some. Let me say this: the 257 is one of the most accurate calibers that Weatherby offers, and if you are willing to be flexible on which load you are shooting, it wouldn't surprise me one bit to see you getting Sub-MOA or better.
That being said, Thompson Long Range builds their 1,000+ yard rifle on an Accumark (30-378 for the kill power at over 1000 yards), it must be accurate. Now, you've said that people talk down on the accumark - I wonder if these people don't like the look, or the feel, or something else? The Accumark is a very distinct looking rifle, and one thing it is not is traditional. Some people will flame on and on simply because a rifle doesn't have a wood stock. Throw in the stainless, fluted barrel with blackened flutes and the rifle definitely has a look that most people either love or hate. Also, the rifle is heavy! If you put a half-way decent scope on your new Accumark it will tip the scales at nearly 12 lbs - no light-weight for sure. This can make it hard to shoot off-hand. But, let's be honest, how often are you going to shoot a 12lbd rifle totally off-hand? I know I am going to either hit the deck with a bipod/shooting sticks, or I am at least going to find a tree-branch. It's not a lightweight mountain rifle, if that's what you want, buy an ultralight.
Anyway, that's my long-winded way of saying "yes, some people don't like it for various reasons, but I love mine and wouldn't trade it for anything!"