How is the site linked accurate if memory varies within the same card model? Or is that not the case?
It's not accurate, the only point of that article is just to get people click on those referral links to Amazon and make some scrap to the site owner (although you know that since you post similar links yourself). 
Ouch
Maybe Vosk doesn't want to be lumped in with me, but I am trying to provide information that is useful - if you want to click my links and I get an affiliate commission at no extra cost to you, then thanks!My site provides comparison charts to help find GPUs that are in stock, and the best price. I built the site to pull most recent prices and stocks from Walmart, Amazon, BestBuy, and am working on adding TigerDirect and NewEgg.
Each card has the hashrate details listed out below so you can see if it was hynix etc memory that was clocked at that speed. I am also working on adding a feature where you can add the hashrate you think you can get (worst case/best case scenario) so that you can compare the hashrate per dollar across different cards to shortcut the research process for people. ie. What's better, the 1070ti, or the 1080?
I'll try to make things clearer to indicate that the results could vary based on memory type etc