This article has a bizarre conclusion. Camels in Somalia, in Saudi, and in Mesopotamia in early to middle Bronze Age (3000-2000BCish), but somehow they're not permitted to be in an area that's at the juncture of all those areas.
Something or someone's logic smells shallow to me.
Dromedaries may have first been domesticated by humans in Somalia and southern Arabia, around 3,000 BC, the Bactrian in central Asia around 2,500 BC,[14][62][63][64] as at Shar-i Sokhta (also known as the Burnt City), Iran.[65]
In accord with patriarchal traditions, cylinder seals from Middle Bronze Age Mesopotamia showed riders seated upon camels.[66][67]
http://en.wikipedia.org/wiki/Camel#Domestication
Concur.
I would add that when dating things such as the domestication of animals, evidence indicates an "on or before date". The lack of previous evidence does not prove anything, although certain presumptions might be made if a substantial amount of nonsupporting evidence exists. The problem in archeology is that alternative explanations almost always exist, and there is strong temptation for archeologists to agree, so that they can move on to assembling the rest of the puzzle.
For example, if a civilization without a written language worshipped Jaguars, but also forbade the depiction of their God (the Jaguar), archeologist might come to some spurious conclusions.