Yes, but not all new EA subs will be HD subs. They can get ViP receivers, but the HD channels will be disabled for their accounts.
I think if Dish does this then they will be stupidily wasting bandwidth that will limit the number of new HD channels that Dish can add. Will there be that many new SD subscribers that can not see 110/119 in the eastern U.S. ? Also if new subs don't subscribe to HD Programming will they have to pay a HD enabling fee?