Build quality? doesn't reflect the constant Dust under the LCD problem that plagues HTC phones and Loose hinges on the G2 too. That whole touch pro fiasco.
Yup all the reviewers ignored it until people started to complain yet say they Galaxy S line feels cheap and plastic yet it doesn't have any of the flaws that HTC.
My G2 hinge is strong as day one. As for my Vibrant I returned, the quality should be said by the second battery included. They expect it to break.
In the end it is how you care for your phone.