Are you using the same Java/Spring I'm using?
Would be nice to see some side by side code of Rails and Java/Spring doing roughly the same things, both written by people experienced in those technology stacks. These debates aren't very useful without code to look at.
I'm sure Rails would be less code and quicker to production.
That's not to say that it can't be done quickly in Spring - Java.
The whole 15 min blog thing is a good example of fast Rails, it's also a good example of non production ready i.e. maintainable and extendable, rails.
Rails brought very little to the table in that respect. Not to people who actually know what they're doing anyway.