I'm betting the new hop farm in central Indiana (Sugar Creek Hops) has to be in the same boat. We've had double the normal rainfall for 3 straight months now. Not very hop friendly.
I happened to see this picture they posted a while back and it's hard to tell, but there's some very pale (lemon yellowish) pockets of foliage which sure look like the beginning stages of downy: https://instagram.com/p/3bx0iKBvXP/ This is a very good example of why it's important to keep the lower vegetation cleared away from the crowns as that's the location the infection usually gets started.
Yeah, definitely showing a yellowish tinge. Thanks for posting.