yes RVP - Reid Vapour Pressure property is adjusted so winter-petrol vapourises more easily. But carbs still has to deliver that petrol into cylinders 1st.
Sounds like you need to send carbs to ducatiman. When I got mine back from him for 250 commuter, it would start up perfectly fine in 20F. Ready to ride after I put helmet and gloves on. Not single stumble or unruly behavior on my ride to S.F.
