It is definitely not the norm. but it does happen. That is a very good pic so I'm sure you could get a better sexable pic. Follow this link to see what view we need.
You have to lift the tail to almost vertical so the feet are lifted off the ground (or hand). It helps if you rotate it like as if you were rolling or twisting a pencil that you were holding by the eraser in a vertical position with the led pointing down. That, I believe makes blood flow into the hemipenis & makes it more visible.
Good luck & I hope to see some more pics.
Dachiu's sexing page
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Joel R
Coming some day.
www.SpikesAndScales.com