Bleg: Turkey's GAP

I was under the impression that Turkey's Greater Southeastern Anatolia Project was more of a boondoggle than success. Its aim was to "raise up" the poor (often Kurdish) people in Turkey's southeast, in the same way that America's TVA was supposed to make hillbillies rich.

Does anyone have good analysis on the GAP? I am suspicious of official Turkish reports, because they may be manipulated for political purposes.