It won't be as noticeable in the uk simply because the temperatures are not so extreme most of the time the outside temperature isn't so low so the drop isn't so great. I believe you are looking at a couple of degrees difference between triple and double glazing when stood practically touching it.
Ah found the old saved bookmark i had. So the glass temp will be 2 degress higher, not ground breaking, but not insignificant if sitting near
"The physics involved here have been worked out in Germany by the
PassivHaus Institute. It has shown what happens to surface temperatures on various forms of glazing when it gets really cold outside, and the internal air temperature is designed to be at 21°C:
- Next to a single glazed window, the internal surface temperature is around 1°C.
- Next to a double glazed window (2000 vintage), the surface temperature is around 11°C.
- Next to a modern, energy-efficient double glazed window, the surface temperature is 16°C.
- Next to a triple glazed window, with a centre-pane U value of just 0.65, the temperature is 18°C."
I do notice that in my home (2007 vintage) its toasty warm and doesnt feel that cold when its cold outside, when it gets really cold outside, so say minus 5 or below it actually feels cold near the windows, particularly the large 3mx2m approx patio doors.
Its not a draft its just the cold from the glass.
The best approach of course is just to brick up the windows
I have heard that some really really well insulated houses can get condensation even on double glazed, something to do with the relative difference between thermal properties of rest of house and windows, not sure if this is true though, could be pub talk