Not in my experience the winter of 2013/14, many of my mature teas died to the ground. All but one did grow back. The ones that did not seem to suffer were Lady Hillingdon, Reve d'Or (although it came down with RRD) and Clementina Carborneri. Mine were about 7 years old. They can't handle temps below 10 degrees for any length of time, apparently.

I've grown 5 teas in my zone 5 garden for about 6 years, so I think they must be hardier than most. The winners are: Mme. Antoine Mari, Maman Cochet, Mrs. B.R. Cant, Georgetown Tea, and Duchess de Brabant. The latter two died last summer from some unfortunate errors (not the rose's fault), but I still had three going into this past winter with plenty of cane. With full leaf bag protections, though, I just got through spring pruning them and none of them had any surviving cane or present signs of life. Not that they're necessarily dead - I hope not after 6 years of babying - but two brutal winters in a row have done their damage. Still in a protected zone 6 or 7, they would have a better chance.

As for Noisettes, Mme. Alfred Carriere is on her 5th year in my yard and has just a little surviving cane and is already showing signs of life. She won't bloom in any given year she doesn't have substantial surviving cane, so she'll grow massive canes this summer that won't bloom, but at least she's reliably root hardy here. I'm planting some more noisettes this spring given my success with her.

Hope this helps - I'd post a picture of the teas, but I'm having technical difficulties with photos for the time being.

Cynthia

Yeah, we normally don't do any winter protection in zone 7 and we don't get any snow. Maybe that is the key.

Cynthia, tell us more about full leaf bag protections...do you just make a "wall"? I lost several feet of cane from any teas and noisettes. Some of them I had to cut back to the ground....MAC took a huge hit back to the ground. I need to rethink placement. I can corral my pots but for those in the ground I'm not sure how to protect canes...

Susan

Hi Susan
Sorry I missed your comment earlier. What I do is take filled leaf bags from people in the neighborhood who leave them at their curbs (with permission, of course). Then I stand them up around and among the most tender roses, mostly keeping a solid outside presence of bags around the perimeter of the fussy roses. You're right that this makes a kind of wall to protect against the worst of the wind, and the interior bags provide sort of a "down coat" effect to add another zone's worth of hardiness to the roses. I don't cover the tops, to keep canker down and not smother the poor things, but I do sprinkle some OAK leaves amongst the canes if I have some extra. The oak leaf part is important as I'm sure those leaves will stay relatively dry and not mat down like most other leaves. That part isn't important. What tends to be important in climates with moisture in the winter is to not push the protection right up against the base of the canes, or you can get canker damage at the base. In a happy tea, the canes would stick out over the tops of the leaf bags, but I expect you could tuck them inside the bag wall for a little added protection as needed.
Note that this method isn't a magic cure for any not-fully-hardy rose. Some roses die on me no matter what I do with protection or otherwise. Like I say, it adds usually an extra zone's worth of protection for the most part.
Cynthia