It does look like mite damage to me as well. As was said before, you will see small webs on the undersides of the extremely damaged leaves. With small plants, spraying the underside of the leaves to knock off the mites seems to work on many plants. I also remove the heavily damaged leaves to prevent contamination of the new leaves.
I do not know how well hops handle leaf removal or water spraying, but usually those treatments wont harm plants if the issue is not mites.