Oh, I see. Apologies then, I thought the implication was outside sites as I know how important they are to a lot of folks.
I'm afraid I can't agree that the stats are going to become "false". Multiple types of game setups have existed for a long time now and stats include those. Modes like Epicenter, Standard Battle, and Domination all influence the length of a battle and your stats along with them. Your random battle stats have always included the stats from those modes and Arms Race will too so I don't believe stats will experience a major difference with the inclusion of Arms Race.