So I got my first trainer in yesterday. I got it all set up put my bike on and started riding. Now Obviously since I am not fighting my bodywieght against gravity My average was 4mph faster than on the road? SO what is your average road vs trainer?

Do spin faster same or just stay steady on the trainer?
How much does the trainer help over the winter? (for those of us in Cold weather climate)
How much Distance do you ride on the trainer?

TIA
Shawn