On Fake photo, yes, that photo is obviously a fake. The original is with a Hornet, see atatched. I've seen this photoshop with helis, superman, etc.

This is not a condensation trail. It is a Prandtl-Glauert singularity (often just called vapor cones.) These require close to sonic speed, so no, you won't see this as I am not aware of any model that can get to the 0.8 mach speed where you start to see this formation.

However, I have seen one model plane, and one plane only, create what appeared to be condensation on the top of its wings during high G pull ups (not the same as vapor cone.) However, the tank vent tubes were also in that general area. It is unclear if what we were seeing was fuel being sucked out of the vents or if it was indeed condensation of water due to the low pressure area on top of the wing.

If any one has confimed a model that can do this, I'd like to know the model... cause I'm gonna want one.