I still don't think he ever will be a legit mlb player and his current ops is not really sustainable (over 400 babip) and will regress but he still is about a league average player after not having played for more than a decade and never really having played at a high level. Sure he is older than the guys he faces but those guys have played high level showcases or even college and never stopped practicing baseball.
Even if Tebow is never making it he is doing a great job holding his own as a 30 year old who has never played at a high level. It probably is a marketing stunt by the mets but he is not embarrassing himself out there like so many thought and his first workouts indicated.
I think we can already say his experiment works much better than MJ did.
But realistically of course he is about a league average hitter at best as a 30 year old who can't really play defense other than an outfield corner, so he still isn't really an mlb prospect. But he is doing a respectable job, everyone who is laughing about him: try to walk on to A ball out of your office at a 30 year old and try to compete with 20 year old really good baseball athletes...