Well I don't know if I'm the most knowledgeable
but I do agree with the quote. The deepest aspect of the Mets farm system is pitching. The Mets don't have a lot of guys who project to be top of the rotation starters (Pelfrey, Humber maybe, Soler??? who knows) but it is incredibly deep as far as guys who project to be 3-5s and relievers. Gaby Hernandez falls into that group so it really wasn't a loss. Petit on the other hand probably depends on what side of the fence you stand on. Is he the real deal or just taking advantage of immature hitters with a funky delivery? If you believe he was the real deal then the Mets thinned out the top part of their pitching depth but there's a lot still there.