It was a different article to your 1st Link, but the context was basically the same, the virtualisation of the graphics memory which Nvidia failed miserably. Having dropped the virtualisation as a mandatory requirement to optional then the major reason why XP couldn’t run dx10 was removed and XP should be theoretically able to run DX10.

However the more you read the more (I) you think it is a lets sell more copies of Vista that drove this.