Am tending to agree with you here, My car was sat for 12hours over night. Outside temp was 5degrees and it would not start if I turned the key and left it. It would try and then the revs would die off and engine stall. It did this twice and on third attempt I blipped the throttle to get it to 1200rpm and its perfect stopping just above 1000rpm while the auto choke is on. I drove the car about 300yards and switched it off (temp gauge had not moved yet), I then returned to the car about 45mins later so it should still be basically stone cold and the outside temp was the same. stood outside the car turned the key and it starts straight up and sits just above 1000rpm no probs at all. So this lead me to believe it is something to do with the fuel pressure dropping off over a period of time and then it takes a bit of help to re prime it on the next start. Any other thoughts?