Dune 2 is the first realtime strategy game ever. I didn't see realtime strategy games on Runequester's list.
No, that is not true.
There are several of them before Dune 2, such as Realms. Dune 2 is the first one to link the need for a particular ressource (the spice) to credits to build army or building. This is what people call real time strategy.
Realms was real time too, but army were bought with money from the taxes.