if the Quran was part of the Arabic literary tradition then Arabs (Christians and Muslims) should have been creating out verses like this:

http://austrolabe.com/2007/05/.....-merciful/

for the last 1400 years.

And yet there has been nothing like this,

if anyone wants to post Arabic poetry of this quality (that is not from the Qu’ran) then they are most welcome to try.

The problem with this type of revisionist historical (?) scholarship is that it is frequently subservient to political currents, is frequently contradictory in its methodology and not faithful in its use of primary sources.

For example, the greatest testament to the authenticity of the Quranic text is that the Shia and Sunni although bitterly opposed in just about every other matter, agree on the Quran. That places the fidelity of the text to within one generation of revelation.

That the same religious text could be independently validated (from a dubious source) after a schism is hardly credible.