Wilshere's goal scoring record while growing up is impressive, he scored 13 goals in 18 games as a 15 year old in the reserves. Even in previous years, whenever he played isolated games in the Carling cup or the Emirates cup I thought he was a goal threat.
Plus his technique is solid and his composure is excellent, he'll pick it up in time. Just like Fabregas, I suspect last season he was deliberately asked to keep things simple which is why he wasn't in the box more.