Of those 30 players, 25 played more NBA minutes than Fab last year. More qualitatively I would rank at least 15 of those guys as having clearly better seasons than Fab. It's still early but right now he is looking like the 40th-50th best plater taken in the draft - maybe worse if some of those Euros pan out.
I think it's understood that Melo is a project who wasn't expected to contribute as a rookie.
Here is an incomplete list of big men who played less than 100 minutes as a rookie in this century: Amir Johnson, Ian Mahinmi, Louis Amundson, Marcin Gortat, Kendrick Perkins, Kyrylo Fesenko.
While the vast majority of players who fit that description turned out to be scrubs, not everyone did. Maybe Melo ends up with the career of someone like two-time world champion DJ Mbenga.
You're right, your list is incomplete. It's also incredibly selective.
Here's the full list:
http://bkref.com/tiny/Mv3E1
There are 120 guys on the full list of frontcourt players who fit your criteria: started in 2000, played <100 minutes in their first year.
I count 3-5 legit NBA players, a couple of whom are apples-to-oranges because they came right out of HS (e.g., Perkins and Amir Johnson). There are maybe 10 other 12th-man types but no one who is anything close to a valuable NBA player.
Beyond that you have...nothing. Of the 120 guys fitting the Melo profile you have maybe 10 NBA players (defined loosely) and another 110 who are total scrubs.
Edit: I just re-pasted the link sorted by WS/48. You can see that even in the small sample of minutes, nearly all of the guys who turned out to be good are in the top 20 of that list, meaning they showed promising early signs of productivity.
Melo is 47th, and there really isn't a single decent NBA player below him.
Um ... WS/48 ... based on less than 100 minutes of play?
Is that supposed to be useful for anything?
Did Jackie Butler turn out to be the greatest player ever?
I agree that the result is surprising, but you can't argue with the pattern in the data: even based on a very low number of minutes played for these guys, nearly all of the players on that list who ended up being good were from the top 20 by WS/48. I haven't tested formally whether the result is statistically significant, but that is something one could do.
It's worth noting that while these minutes numbers would be a small (tiny) sample for evaluating the play of any one player, from a statistical perspective, the sample here is 120 such "draws" of up to 100 minutes each, for 120 different players.
That seems to yield more information than would any one player's performance over such a small number of minutes.
As an illustration, no, Jackie Butler is not the best player on that list - but to argue such a thing would be relying on a single observation from the list.
What I think the data do say is that the top 20 on that list are significantly better than the guys in any other group of 20. That is a comparison with more statistical power.
I may have more time later, and could actually run the numbers to test formally whether those in the top 20 have had better careers than those in the other brackets, if anyone is curious.