What gives you that impression? Where did you get the numbers from? I reckon RoR is faster for rapid prototyping and development of new features so I'd choose

What gives you that impression? Where did you get the numbers from? I reckon RoR is faster for rapid prototyping and development of new features so I'd choose that in the beginning for a one or two man startup. Later on if there's anything in particular you need that Python does, you can always recode once you're profitable.