The conclusion contains a paragraph that matches my initial reaction to the headline and opening. "It seems that the experiment at least does not contradict with a common believe that is often articulated in the area of type systems: that dynamically typed systems have a benefit in small projects while this benefit is reduced (or even negated) in larger projects." (It goes on, but I can't seem to copy actual text out of it, I typed that).
My feeling about this has always been that dynamically typed languages will save time on initial implementation and small projects, and statically typed languages will win on large projects and things that require more maintenance. They acknowledge this, and didn't find anything to contradict it.
Their own graphs seem to show that effect too. In some areas, dynamically and statically typed languages were equal, while in others dynamically typed languages had lower times. I don't actually see where the conclusion that a "static type system had no effect on development time" came from, it appears that it had an overall (if not very large) negative effect. Just like I would expect for a small (27 hours) project.
I didn't crunch the numbers though, maybe I'm just eyeballing it wrong. (again, I can't seem to copy-paste out of it, and I don't feel like reentering all of them)
My feeling about this has always been that dynamically typed languages will save time on initial implementation and small projects, and statically typed languages will win on large projects and things that require more maintenance. They acknowledge this, and didn't find anything to contradict it.
Their own graphs seem to show that effect too. In some areas, dynamically and statically typed languages were equal, while in others dynamically typed languages had lower times. I don't actually see where the conclusion that a "static type system had no effect on development time" came from, it appears that it had an overall (if not very large) negative effect. Just like I would expect for a small (27 hours) project.
I didn't crunch the numbers though, maybe I'm just eyeballing it wrong. (again, I can't seem to copy-paste out of it, and I don't feel like reentering all of them)