Noticed the same trees last year and they bounced back fine after a dry spell. Seems like we get worried every spring but most pull through. My sugar maple looked terrible in May and now it's full again. Might just be normal leaf spot from all the rain.
Jason_hunt27, my maple had more spots than a dalmatian last May. Now it's so thick you'd think it's hiding something. Maybe trees just enjoy messing with us every spring.