While there are many trick etc for a canister to work in cold weather and the JetBoil canister might be a bit better- remember below 0 deg C they freeze up just like water... Also a JetBoil is bomber as hec... but that is beside the point... for the same price an MSR simmerlite or whisper lite uses liquid fuel, is lighter, and cooks more evenly. If you just want a really light weight stove get a pocket rocket or a Snow Peak- but honestly the jet boil seems like a waste of money imo.
however, to answer your question- I would be quite skeptical of any tricks to get a canister to work below 0 deg C.