Magento might be slow. We published the tutorial on how to speed up magento by reducing time to first byte TTFB.
summary:
- Enable builtin magento Profiler
- Disable not used magento extensions or observers
- Go over every .phtml file to optimize php code
- Upgrade magento to the latest version
Go check it out http://www.goivvy.com/blog/magento-o...irst-byte-ttfb for the detailed instructions on how to get low TTFB for magento store.