I have done some research on cupping and found that without pre heating the cupping cups or glasses, I am brewing on a temperature between 75 and 83 degrees Celsius(167 - 181,5 farenheit).
While pre heating the cups gave me a brew temperature of 86 to 93 degrees celsius (187 - 199,5 F)depending on the glassware or china
Your post was interesting, so I ran a little experiment. I compared the thermal performance of a Bodum double wall glass to a 375ml "French jelly glass."
To each glass I added 7.5 grams of coffee:
And then poured in 160 ml of water, just off the boil. Four minutes later I measured the temperature of each sample using a low mass bead-type thermocouple. The results:
Double wall Bodum: 186F
French jelly glass: 168F
There are at least two reasons why the Bodum sample was so much hotter: (1) the double wall provides insulation, and (2) the Bodum weighs only 108g compared to 257g for the jelly glass, so it provided less of a heat sink.
The jelly glass certainly is more practical for daily cupping use; it's a lot more durable.
Of course, the most important question is whether one type of glass provided a better cupping experience. I have done very little cupping, but in this single test I didn't find the flavor balance to be significantly different, especially when they both cooled down.