so you're using your speculation to debunk another persons speculation?...and most of the speculation is coming from the same videocardz site
I never said it debunked it, just that it was something for the other side from that claim.
Note the the word "evidence" is in quotes, meaning it's not really much in the way of evidence.
But this is not speculation, this is a data from a benchmark database. It could be faked, but much of the time they are real as someone testing a product lets it into an online database.
The claim that every card witll double VRAM the generation is OTOH, nothing but speculation, and it wasn't from Videocardz, but a less reputable site.