I'll take both sides of this argument.
For those that are saying that he was never the prospect and never had that type of talent, you may be right but once a player gets to the show none of that really matters anymore. You can look at all the scouting reports you want to but they don't mean anything when a player is producing at the pro level. There have been plenty of players that supposedly lacked talent and have come out of nowhere.
On the flip side, the 1st season of a player's career can be pretty misleading. We see it a lot where the league eventually catches up to a player, neutralizes him and returns him to mediocrity. I hope Karabell is correct about his Tejada comparison because I grabbed Peralta off the WW in a Dynasty league but as Bigh0rt likes to say, I think Karabell needs to lay off the crack pipe. It's a bit early to be making those comparisons.