Well it should be under warranty then... I had my new one go bad after only 15k miles I think it was. BUT also as davenay said, sometimes they fool you and the opposite one that you would think from the test is bad.
Try this - jack up the front end, crawl underneath from the front (leave the tires on), and grab hold of the coil spring one one side. Have someone else give the wheel a good spin. Then do the same on the other side. If the hub bearing is bad enough you'll feel a raspy vibration in the spring on the bad side. When I had my bearing go out on me again I had the shop check it out (their warranty work) and he showed me this trick. Now mine was really bad and quite loud so I don't know if a mildly worn one would do this or not, but worth a shot.
A noisy tire won't necessarily show anything externally. The tires that were on my TB when I got it were rather noisy, almost bearing-sounding, until I replaced them. My parents have Mastercraft Courser tires on their vehicle and one recently within the last few thousand miles started making quite a racket. Thought it was a bearing until he rotated the tires and the noise followed the tire. Nothing appears to be wrong with it other than the noise. You could try rotating the tires and seeing if that makes a difference up front.