This is dubious concerning both facts and theory.
Construction of shelters goes much further back. The mammoth bone designs of 15 kya for instance -
http://donsmaps.com/mammothcamp.html
So it is reasonable to conclude that shelter building was already advanced at 10kya, but little of it would have been preserved if mobile bands of hunter-gatherers were building trail camps of wood and hide.
Shelter is in fact not a great benchmark precisely because it does not preserve reliably, unlike tools or art. You end up with endless disputes about whether there really is a circle of perimeter stones and post holes, or just some assemblage swept together by natural circumstance.
And then art is primarily a cultural activity, not some individualistic expression. So "cognitive teamwork" would have been just as important there as in constructing a ritual site.
Again, Gobekli Tepe does spell something unusual in terms of hunter-gatherer economics, and then quite possibly something new also in terms of social organisation. But we should be looking for the simplest possible explanation of what is found.
Again, it doesn't take any special intelligence to pile up rocks - apologies to any builders out there. The technical skill involved in knapping flint, making clothes, crafting weapons, is just as demanding. As for emotional intelligence, there are some who even claim that trade between tribes goes back 100 kya or more. (http://www.sciencedirect.com/science/article/pii/S0047248400904354)
But what such construction does take is the economic and social circumstances to make it happen.
Any claim you make about mental sophistication has to be stacked up against the paleo evidence like the rich cultural and ritual life of the Australian aborigines who split off 50 kya.
Gobekli Tepe may turn out to have some kind of significance as an innovation in social organisation - that is a possibility. But it appears to have zero significance so far as human cognitive ability goes.