… but even here in Colorado winter, with altitude as a factor as well as the cold. I would say 3-5 is more accurate, at least for my bike. As others have already mentioned, by the time I check my bike over and get geared up the bike is ready to go when I am. I haven’t found myself sitting around thinking “Damn I wish this thing would warm up faster,” or thinking .. “Man.. I absolutely have to have FI on my next bike.” I would just as likely buy one with FI as I would without it if the bike was what I wanted.
I suppose if maybe I was regularly riding from Kansas City (740 feet) to say Breckenridge (9,600 feet) I might think otherwise, but it really has been a non-issue so far.