As Brent S notes on the other thread, "While playing on the Cuban national team with then teammate Jose Iglesias, Hechavarria was penciled in as the starting shortstop (Iglesias slid over to 2B). Iglesias is currently considered a world class defensive shortshop." That's a promising sign regarding his defensive abilities, for sure, as I've read nothing but rave reviews about Iglesias's glove. Links to video of Hechavarria and quotes from the Cuban Ballplayers Blog are available in the first few posts in the thread.
Further details to be updated as they become available.