Like the quote said, I cut mine down (strings and all) and threw some composted manure and mulch over them. I didn't get as much mulch as I wanted, but they're relatively well-insulated all the same. The 30" of snow we've gotten so far this winter hasn't hurt either.
Last year I planted my rhizomes in early April during a warm spell and they did just fine. Apparently they aren't too sensitive to cold. It's probably too late to do anything but watch the flakes fall, so RDWHAHB. They'll be fine come spring.
Natural 20 Brewery
Yes, that *is* beer. Water, malt, hops, and yeast mean it's beer. Go ahead and try a glass...