Yes indeeed, i'd say maybe 1 in 25 of the "types" we are talking about is the real deal. Maybe im being too generous.
Given you are a painter. I'm into art, especially the female physique. All shapes and sizes, but all female bodies. Photography, sculpting, etc.
There are certain parts of the male and female physique that can be slightly off and still be feminine or masculine...but when they are very much off in photos they tell me a lot about something being not quite right.
There is a certain body proportion of arm length, leg length and torso length all in coordination with female bodies. The hands are of normal female size in proportion to the arms, same goes for the feet with the legs. These are dead give aways for me when i don't have a face to look at. Even the best transexuals can look convincing after surgery, but most don't get to look as a passible transexual that easily. Passable female transexuals still battle with the hands and feet, upper arms and nect being all together very masculine in appearance.
If had to look at the picture of the OP and give you ONE thing that stands out more than hands, arms, legs, etc.....it would be the neck. The neck is improportionate to a female body, any female body, but especially a female body of that sort of thinness.
For myself I'm still not that bothered by people faking stuff, but I'm a little more aware now of how much damage it can do. I suppose I'm now thinking that it depends on the faker's intentions. Of course we don't know what their intentions are, so I should probably be a little more wary. Lesson of the day for subgirl: Be wary of taking people at face value - they may be made of plastic 
