HDtracks is just a distributor, so what they say is true, but it's a bit of a white lie. They take what they are given at face value and do a poor job of vetting those submissions.
The right question would be - do they ever release upsampled works? If their answer is no then they are certainly lying because these is much evidence to the contrary. There is also evidence out there that they go back to the source and get the corrected works and rerelease when they've been called out on this activity. They've also made claims that they would do a better job at this but continue to 'eff up. I haven't bought anything from them in 6 mos so I'm not sure if they've finally made good on this
Edited by bobeau - 5/25/12 at 9:54am