I have no doubt that it's true. Even though large corporations move slow, that doesn't mean that they don't have forward thinking people that work for them. I personally think that it's only a matter of time for large corporations to choose technologies where they can be more agile. Yes, Java has served its purpose for a number of years, it's become bloated and fragmented. One key determinant for corporations to make the move will be the availability of quality Rails resources. They won't be able to rely solely on their current Java resources because (IMO) many of them will not want to make the move (i.e. learn something new). Corporate america can definitely benefit from Rails. Just the same, Rails can benefit from corporate american using it in its enterprise technology stack.