Which does not make the 980 a mid range card.
The 980 is nvidia's current fastest card available, but they could no doubt put out the ti and new Titan more or less immediately if they chose to do so. They aren't doing this in order to double dip on people's wallets by holding on to the new cards as long as possible.
The 980 IS a mid range card but nVidia simply aren't allowing you to buy the flagship cards yet.