The TWTR and FB earning's calls in the last few weeks have shown how their growth rates continue to collapse. Where are the X is dying articles for them? TWTR's

The TWTR and FB earning's calls in the last few weeks have shown how their growth rates continue to collapse. Where are the X is dying articles for them? TWTR's price is down by nearly 50% and below the IPO price, is it dying? Then again, since G+ doesn't have to publish numbers, we cannot compare apple to apples.