[edb]

I think this is an unfair blanket statement. I think that every APPLICATION, forget framework-dependent or not, will have its bottlenecks.

I see so many size comparisons about which framework is faster than the other... People need to realize that a framework is nothing more than an application library. A smart developper will know how to use it to his/her advantage and will know how to identify bottlenecks and optimize them.

The point is to get your ideas into the wild fast. All you need for that is a development environment YOU'RE comfortable in, be it RoR, CakePHP, Code Igniter, Zend, whatever..

Once your idea is in the wild and generating traffic that breaks all your best optimization tricks, I'd hope that you have enough revenue or interest generated to then start rethinking the framework that it was built upon.

I think if you're rewriting frameworks and tools like wordpress from the get-go, you're missing the point.