I dug a couple of rhizomes last week for couple of coworkers. I had no visual growth. We had snow on the ground this week in NE Ohio with 2-4" expected tonight. I checked the hops yesterday. I have visual growth on all 9 plants with magnum and chinook with 12-18" shooters.
FWIW, the Thyme Garden always sent me my rhizomes the second or third week of March. They are out of Oregon I believe. The first year (2012) was the warmest March on record here, so I planted the day I got them. The next year, different story. They stayed in the fridge for almost a month before I could put a shovel in the ground.