I do think the Rails hate is overdone, considering Rails is still good at what it's good at - enabling you to build features fast enough to outpace competitors so that you get to the point where you actually have scalability problems. That's pretty valuable in and of itself. Hopefully projects like Rubinius will shore up the performance/scalability issues, though competing with the millions of man-hours spent making the JVM massively robust and performant will be a challenge.
I do think the Rails hate is overdone, considering Rails is still good at what it's good at - enabling you to build features fast enough to outpace competitors so that you get to the point where you actually have scalability problems. That's pretty valuable in and of itself. Hopefully projects like Rubinius will shore up the performance/scalability issues, though competing with the millions of man-hours spent making the JVM massively robust and performant will be a challenge.