Matt Moore (5-0; 1.13 ERA) looks like the AL Cy Young of April. He's gotten great help from the Rays lineup (5.6 Runs Per Game), but has showed that he hasn't needed it. The MLB is a pitchers league, and the AL is stacked with pitchers with good starts. Clay Buchholz also has a 5-0 record and do you think he'll win the Cy? No. Yu Darvish, Felix Hernandez, CC Sabathia, R.A. Dickey, Josh Johnson, Mark Buehrle, and other pitchers all pitch in the AL. Good starts or not, all these pitchers have good track records and could easily get hot and win the Cy.
Also, rookies (or sophmores) are prone to go through cold streaks. Stephen Strasburg hasn't been on fire, and even though Moore has, he still has 5 months to fail. Matt Harvey has the same case. Both Matts may have had just good Aprils.
There is some backing to having Moore win the Cy Young. In 39 games (37 starts), Moore has a 1.27 WHIP, which is very impressive. And he already has pitched over 200 Innings (218.2 IP). Hitters have had plenty of time to adjust to Moore. So, he may just win it.