Yes here in Illinois my yearling pony is starting to shed as is one of my larger horses. I've always noticed some shedding at this time of year. They are both not blanketed and that might make the difference, I'm not sure.
Mine has just now started to noticeably shed. They are usually starting pretty much on the first of the year, so I was concerned my boys were late! The hay quality hasn't been great this year, so I was contributing their slightly lacking nutrition to their late shedding.
My friend's mare, who is blanketed, has been shedding since before new years.