XD, no it doesn't really mean that. It could, but all of those computers on that site are C2D - Core 2 Duo - There E8500 etc.
The Pentium D is a dual core CPU but its not the whole Intel like of Dual processors. There family names, C2D is a family name, Pentium is a family name of CPU's, and the next family is going to be the i7 family.
One: The pentium D has a horrible architecture. What are they using in it, two P4's or something stuck together?
Two: They run VERY HOT!