I talked to Mr Porter.
He has not seen this in his flock. He found a picture from Sweden of a "frizzle'. They look different than this guy.
He thinks this is physically done to the feathers.
I then remembered you said the other birds picked on him. I am betting they pick on him worse than you know and mechanically broke the webbing in his feathers.
For this to be genetic, other than some once in a godzillion mutation is approaching zero. From what I have learned online and from Porters genetics sight. Both parents would need a Hh (hairy) gene to pass this on. If a turkey lays 100 eggs for a year and he breeds her for 3 year that is 300 poults.
You would expect somewhere around 75 poults to look like this. A large enough number someone would notice it.
I am betting if this guy is moved someplace alone or with just one or two non-aggressive hens after next years molt he would be normal. Occam's razor applies here.