It's probable due to the fact that the ECU is set to automaticly enrichen the mixture on cold start up. Carb bikes naturaly still have to have choke but FI bikes can be just take a few sensor readings and adjust accordingly
It shouldn't really be all that much technology. Just a reading from the oil temp sensor (for my bike at least it's in the heads. Don't know about your bikes.) with the computer set to enrichen the mix by a certin % till an ideal temp.
I don't know. At this point I'm just taking a shot in the dark. But it seems to make sence to me. Please someone let me know if I'm just talking out of my a$$