Than what?
Do you except the 1659 had the same or better price-performance as the 580, 590 and Vegs56?
Yes the performance per dollar isn't good for all those cards you mentioned, but look at the chart again. Notice the 570 sitting pretty, 27% ahead of this new 1650. With it's price and the performance it gives, it makes a mockery of this new 1650 and yes if just about everything else as well at this price point.