Ben Badler wrote this about Montero:
Montero's best pitch is his fastball, which sits at 90-93 mph and touches 95 with late hop, making it tough for hitters to pick up. His fastball plays up because his command of the pitch was so advanced for Rookie ball. He'll need to improve his secondary pitches, a fringy changeup and a below-average breaking ball, though he throws them both for strikes.Montero's interesting in that he signed late by international standards - he'll be 21 in October - but he blew through four levels in the system this year.
Given that he threw 71 innings total in 2011, a full season in the rotation in Savannah would give him ~120, and a 50 inning bump. That's a little high. Even so, at 21, he'd be the right age for the SAL.