We are based on Amazon Web Services (ELB + EC2 + nginx + powerdns + apache + FastCGI). I admit the current response time is very slow, but our team members make a lot of effort to improve it.
It may be the different issue, but some node hackers may disagree to use Node.js with Apache + FastCGI. However, it is our challenge to make the node technology available not only to geeks but also to light users who will take advantage of server side javascript.
We'll improve the performance and I welcome any advices!