no, people that are exceptional MUSICIANS rarely flash what's not needed. even though they have talent and skill to spare...they'll rearely smack you in the face with it.
anyone can show off.....not everyone can play with restraint and taste.
Sure.
People have ego's, though. The aquisition of skill is like getting your driver's permit, or license; When you first get your permit/license, you want to drive every change you get. It's new, and it's fun. After you've had it for awhile, a car is no longer a source of fun and exploration...
...it's nothing but a means to go from point A to point B. I have grown into a musician - but their was a time when I aquired skill for it's own sake, and that mentality came through in my music. Now, I'm more skilled than ever, but it's no longer exciting to show the world how deep my 'bag of tricks' is, in every song I play.
This guy seems young, so I am not surprised. My point is, very few people will aquire a lot of skill, and not go through a phase where they're, at least, tempted to show it off.