Why do you think an anonymous message board post should be given any credibility at all?
I'll give the guy a little credit because he supposedly works in retail distribution (including video cards), and didn't just show up on the internet for the first time to make these rather bold claims. Based on some of his recent posts at OCN he doesn't seem to be an AMD hater either.
I can't give him a lot of credibility, though, because:
1) I don't know much about his history other than what he and others have stated about himself.
2) Even people with normally trustworthy sources can get fed bad info either intentionally (malice, find sources of leaks, etc.) or unintentionally (source had bad info but didn't know it).
3) What's true today may not be true tomorrow. Perhaps there was a severe glitch but AMD finds a fairly simple workaround and a crisis is averted.
AMD has done public demos of Polaris.
At what frequency? If the frequency was around 850MHz then running public demos does absolutely nothing to dispel the rumor.
Is this final silicon? Is Polaris 10 in mass production already? Are Polaris 10 cards already in AIB hands? If you can't answer yes to all of these then it can't be proven how well retail Polaris 10 would clock at this point.
They've said, from the start, that they were targeting mid-2016 as the release timeframe. And they've now said explicitly that these latest rumors are BS.
AMD didn't explicitly state anything about the rumors being BS in that story. Here is the quote: "there are no production issues whatsoever with Polaris and it’s on schedule"
"No production issues" is not the same as "no design issues". No production issues means GloFo hasn't screwed up, or it means Polaris 10 mass production hasn't even started yet so GloFo hasn't had the chance to screw up. It is quite possible to make a very disappointing chip with terrific yields.
Do you know what the production schedule for Polaris 10 is? Has mass production started yet? Has AMD made it public? If production of Polaris 10 hasn't started yet AMD is free to change the schedule and quantities produced at any time in the near future, and still technically not be lying when saying its on schedule today.