Looking back at this post from 9-10 months ago, I still think everything is true but I'd like to add some other details I've learned since.
Geographic Location and available Recruitment Pool.
A geographic location has huge effects on the recruitment pool bad and good. Some areas are bad and some areas are good. When its good, such as supply of models (good for photographers), that means there is a nice size amount of models available in the freelance world for paid work or/and TF work. When its bad, its the other way around where even paid models in the area are not existent and at times the only option for photographers is to recruit from outside of the area for models and can cause for increased in costs for the photographer/art director for the shoot.