quick scout of dratees of over 3.5k and all star potential has shown this.
There were only 15 18 year olds who fit the bill.  Of those there was 1 MVP and 5 superstars
And 86 19 year olds with 5 HoF, 10 MVP and 20 Superstar
The best 18 year olds are
(34644777)	Terrance Dunstan	C	18	206	3721	9
(34644892)	Eric Nicodemou	SG	18	183	4652	8
(34644299)	Benji Nicholas	PF	18	211	3899	8
(34644157)	Barnett Swancutt	SF	18	203	3764	8
(34644320)	Rufus Greco	SG	18	198	3722	8
(34644897)	Andrew Moore	C	18	226	3557	8
While the best 19 year olds are
(34644113)	Evgeny Oslopov	SG	19	196	4839	10
(34644661)	Zhang Chongfa	PF	19	198	4326	10
(34644068)	Dario Prcic	PG	19	188	4018	10
(34644253)	Luc Tuiahi	PF	19	188	3950	10
(34644702)	Saro Scaratti	C	19	208	3587	10
(34644222)	Jason Garfinkel	PF	19	206	4522	9
(34644597)	Beau Edwards	PF	19	188	4418	9
(34644414)	Clayton Tycho	SF	19	188	4132	9
(34644063)	Shaukat Gupta Lecturer	C	19	226	4132	9
(34644660)	Ditmar Rapf	SG	19	185	4115	9
(34644451)	Ike Orford	SG	19	203	4023	9
(34644217)	Johannes Romeder	PF	19	211	3779	9
(34644067)	David Askew	C	19	206	3769	9
(34644728)	Gino Pescio	SG	19	193	3592	9
(34644130)	Stacey Allenby	PG	19	208	3522	9
(34644937)	Harsana Dey	SG	19	183	5759	8
(34643994)	Mei Xiaoxing	C	19	208	5297	8
(34644585)	Todd Ruakere	SF	19	196	4956	8
(34644072)	Tadeusz Basiewicz	PF	19	211	4687	8
(34644298)	Xavier Rampton	SF	19	193	4563	8