.NET vs. J2EE
".NET 1.1 framework running on Windows 2003 with SQL Server 2000 database achieved the best throughput results for direct Web Service invocation test on an 8 CPU host, at 1488.53 transactions per second (1072.90 transactions per second on a 4 CPU host), followed by .NET 1.1 running on Windows 2003 and Windows 2000 with Oracle9i as the backend database. The fastest J2EE application server performance was achieved by JBoss running on Red Hat Linux 8.0 at 513.33 transactions per second (354.25 transactions per second on a 4 CPU host) and followed by Application Server Y at 411.87 transactions per second (312.70 transactions per second on a 4 CPU host) and Application Server X at 288.26 transactions per second (213.37 transactions per second on a 4 CPU host)."
[Doculabs]
Thanks to Edgar for pointing this one out.