Comment Re:where did he get this factor? (Score 3, Informative) 752
OK, let's say AJAX didn't exist for a moment. People would have to refresh their browsers to display/submit forms, which would require Apache/PHP to serve a *full web page* for every form displayed and submitted. This in itself causes a load on servers, before dynamic content is even considered.
If anything, AJAX *lowers* server load.