True, class is no indication of hardiness- I was specifically thinking of some of Cindi's hybrid teas that I used to grow.
I had the most terrible, heart sinking feeling yesterday while sitting on the porch looking out over the garden. The McCartney rose (own root from someone who started it as a cutting) has been in the garden about 8 years, and for the first time it has 4 big healthy canes about 4' tall that survived the winter
Those canes are bursting with new growth, and from the porch it looked suspiciously red and bunchy. Of course my first thought was RRD- in that moment I almost vomited. I looked closely to find healthy, normal growth- what a relief! I realized this is the first time I've seen this rose actually grow from old wood- I believe every other year of its life the canes were killed to the ground. I'm taking that as a sign this will be a stellar year for roses