I'm not sure I can add more to what is already posted. My 2005 RT has never sat unused more than 5-7 days since I've had it. I ride year round to include commuting to work during the winter. The motorcycle sits outside in the parking lot overnight. Coming out in the morning after a night shift, temperatures have been as low as the low to mid 20's. It's sometimes been slightly sluggish but always fired right up on the first or second try.
Experience IS NOT the best teacher! Someone else's experience is the best teacher.