If they don't live up to expectations then the xMac should get a desktop processor with a midrange AMD GPU. For all I care that GPU could be a Fire Pro compatible with the Mac Pro. It would be nice to minimize platforms to support to have a midrange pro GPU in the machine.
If you read the site enough you come away with the feeling that the get to much "support" from Intel. Basically they punt objectivity to be a cheerleader for Intel. Often they cherry pick results to publish to show Intel hardware in the best possible light. That might be OK for Intel but Anandtech puts them selves out there as some sort of objective blog that people seem to respect.
Basically it comes down to this, I may read Anandtech but it don't trust them. If something looks interesting I will put it on hold to I can find more objective reporting.