ASP.NET destroys J2EE
I was looking around the new asp.net site and notice this awesome review of ASP.NET vs J2EE. Here is the snippet taken from ASP.NET.
In a head-to-head comparison of performance and scalability between Sun's Java Pet Store J2EE blueprint application and the ASP.NET implementation, Microsoft .NET significantly outperformed J2EE. The bottom line: the ASP.NET implementation required only 1/4th as many lines of code, was 28x faster (that's 2700%), and supported 7.6x as many concurrent users as J2EE, with only 1/6th as much processor utilization.
The link below goes to the MSDN article and the code so you can test yourself.
Link: Link to full MSDN write up