HAHA, Narnia.
I'll call this a rumor. If true, good, because apparently sports games sell horribly on the GBA, so strong DS sports support will be needed early on.
As for pricing, I think Nintendo will go with GBA-like pricing whether this post is legitimate or not, because people are used to paying that price for handheld software. Why give up extra profits by making the games cheaper? It also leaves more room for price cuts later on...Gameboy has never had to have "Player's Choice" titles because it never had any real competition. A library of cheap, popular games will be a must for DS to combat PSP.