I questioned WotC_Shoe on using an odd order-of-attributes in his blog post, and he replied with an interesting tidbit!
WotC_Shoe said:Str, Con, Dex, Int, Wis, Cha. A slight re-ordering, as we've paired ability scores to match their respective defenses. Str and Con feed into Fort, Dex and Int feed Ref, and Wis and Cha feed Will. More details on exactly how will probably follow from the D&D Experience experience.