No-the gravitational waves detected by LIGO were produced 1 billion years ago, i.e. 12 billion years after the Big Bang and are classical.  The primordial gravitational waves, that were produced during inflation, are much harder to detect-the efforts to detect them, indirectly, through the electromagnetic waves they give rise to, have to deal with the uncertainties of the electromagnetic response of interstellar dust, as BICEPx and Planck have found. 

Hadi:   The detected merging of two black holes were about 1.3 billion light years away.  During the news conference Kip Thorne said that the sensitivity of the interferometer had been increased by a factor of 3 and this was about the signal to noise ratio of the detected signal.  He said that the previous sensitivity would have missed this signal.  

To answer your question about the maximum distance, this obviously depends on several assumptions including the source of the gravitational waves.  Previously they were quoting distances based on the assumption of merging neutron stars.  These are much more common than merging black holes, but the merging black holes are much more energetic. Therefore LIGO can detect merging black holes over a much larger volume of space. The larger volume might make merging black holes the most common detected object.  Therefore, to answer your question we will assume merging black holes as the source of gravitational waves.   

Next we need to assume the sensitivity of the detector.  LIGO is currently shut down for upgrades.  When it comes back on line, it will have 3 times greater sensitivity than the recent sensitivity.  Therefore, we will assume an additional factor of 3 sensitivity over the sensitivity used to detect the merging black holes over a distance of 1.3 billion light years.  The detector is sensing wave amplitude rather than intensity.  Amplitude falls off proportional to 1/r, not 1/r2.  We need to make other assumptions also: 1) an acceptable signal to noise ratio, 2) how many other GW detectors around the globe would be joined together to improve the signal to noise ratio, and 3) the effects of the expansion of the universe on the frequency and amplitude of the signal.  Without going into all these considerations, my guess is that they should be able to detect optimum merging of black holes at a distance of about 5 billion light years. 

LIGO and the gravitational waves: the Biggest and the most Expensive LIE in science!

“They detected what can not be detected: gravitons having the speed of light and positive mass“ Adrian Ferent

LIGO scientists estimate that the black holes for this event were about 29 and 36 times the mass of the sun, and the event took place 1.3 billion years ago. 

It is like SETI, the Search for Extraterrestrial Intelligence an exploratory science that seeks evidence of life in the universe!

What they discovered:

1. They calculated the postive mass of the graviton, my theory explains that this is wong!

If the graviton has positive mass, it has positive momentum this means the Earth pushes you, and we suppose to fly!

“I am the first who understood and explained the Gravitation with high speed gravitons   v = 1.001762 × 1017 m/s, with Negative Momentum, Negative Mass and Negative Energy” Adrian Ferent

2. Black holes have the escape velocity bigger than the speed of light, this means the gravitons with the speed of light can not escape, this means they will never be able to come to Earth, to LIGO!

“How light can’t escape from inside event horizon of Black holes, in the same way the gravitons with the speed of light c = 2.9979 × 108 m/s can't escape from inside the event horizon. Only high speed gravitons, v = 1.001762 × 1017 m/s, can escape from inside the  event horizon of Black holes and keep the galaxy together”  Adrian Ferent

Einstein Gravitation theory: Gravitation is a distortion of space-time.

Ferent Gravitation theory: Gravitation is a force mediated by gravitons.

Einstein Gravitation theory is wrong and Ferent Gravitation theory is right!