My '09 is extremely cold-natured. Choke knob doesn't seem to allow partial opening either...it's more of an on/off switch. Apparently, a re-jet could fix this cold naturedness(???), but I'm hesitant to do any mods until after a good breakin period. Even at that, I'm quite happy with power output and don't see rejetting for power alone.
Currently, there's a flat spot (more like a brick wall) around 3000rpm, and the engine won't rev past that until it's fully hot....unless it's choked, then it idles around 4000rpm. Thus, I'd like a variable choke as well.
Just got the bike 10 days ago and happy in every way, except for the warmup/choke stuff. And that'll probably get better after breakin.