> PHP has the same scalability problems as JSP. It performs well with a few concurrent users, but with tons ... more machines, distributed computing please => scalability.
Thats a bunch of crap. The JSP is compiled into servlets and the servlet is cached. Multiple threads make use of the Servlet at the same time. In addition, with JIT turned on, the Servlet is somewhat compiled and optimized. How the heck can you say PHP is even close to this? JSP can take the load with no problem. The servlet/JSP container was designed with this in mind.
Be careful with what you say...because you are clearly incorrect.