Here is a quote from Jason's Coach in a UK article about his visit there.
“Jason is a very talented kid,” Coach Palmer explained. “He’s extremely strong, he’s a very well-built young man. He’s 6-foot-2, up to about 204, 205 (pounds). His bench is over 300 pounds, he squats close to [400]. He works his tail off–on and off the field. The thing that is most intriguing to everyone across the board is his ceiling is so much higher than where he’s at right now. He goes out there and makes great plays and catches over top of people or breaks three tackles and goes to the house. He does all these things and you’re still sitting there going ‘This guy could be even better once he figures it out,’ because he’s only played three years of football… He could take a two-yard throw and take it to the house from 50, 60 (yards) out with relative ease.”
It also said that Jason is young for his class. It said he won't turn 18 until next July.
I turned 18 during my freshman year at ISU (September), so it's not so unusual. I like to think I got a year's head start on life. Doesn't sound as if his youth is holding back this young man from great things!