Fuck that. My friends are the smartest coders I know, and the best people to go drinking with, meeting people, mountain biking - basically the coolest people in the world.
We had some views in our rails app that could be hit several times per second by our users, and they were uncacheable, so we implemented the views in c++ using libpg and fastcgi. So much awesomely faster.
If you've got some code that works well and you can solidify into c++ (ie - you're no longer tweaking it 3 times a day) - it's totally worth spending the time to rewrite.
I think C++ on rails would be a great idea, ie - some code generators to help you port your most used .rhtml views over to C++.