I'm not so much concerned about Vista, but as for Dell. Their customer service was bitterly poor only a few years back and repair was extremely awkward in my country. Dell has countless issues too, including exploding batteries-- one of which ignited in an airport. Its that kind of stuff that puts me off them, big time. Dell computers are so breakable, and the general brand is just gross.
Okay, its my turn to make an ignorant claim with no evidence beyond my general opinion. YOU don't like people bagging Vista because you can't afford an upgrade, thats why you are so bitchy about people disliking it.