I'd call it too much unless you're really having to work hard at stabilizing a broadhead. But then, I've used feathers with enough helical that the leading edge of each feather was directly in-line with the trailing edge of the feather next to it, so what do I know...[8D]

As long as you've got good rest clearance and you're not getting too much fletching noise, it's no biggie. They should tune up and fly great over normal hunting distances.