CPU: Intel Pentium DualCore E2160 (1.8GHz)
MEM: 4G DDRII 800
HDD: Raptor 36G
OS: Windows Server 2008 Enterprise
HTTPd: Apache2.2(Win32) + memcache

Server Software: Apache/2.2.8
Server Hostname: 192.168.1.252
Server Port: 80

Document Path: /index.html.en
Document Length: 1456 bytes

Concurrency Level: 10
Time taken for tests: 5.18000 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Keep-Alive requests: 9907
Total transferred: 17525913 bytes
HTML transferred: 14560000 bytes
Requests per second: 1992.83 [#/sec] (mean)
Time per request: 5.018 [ms] (mean)
Time per request: 0.502 [ms] (mean, across all concurrent requests)
Transfer rate: 3410.72 [Kbytes/sec] received

=============

同じスペックで
OS: CentOS 5.1
HTTPd: Apache2.2 + memcache

Server Software: Apache/2.2.3
Server Hostname: localhost
Server Port: 80

Document Path: /index.html.en
Document Length: 1456 bytes

Concurrency Level: 10
Time taken for tests: 2.841373 seconds
Complete requests: 10000
Failed requests: 0
Write errors: 0
Keep-Alive requests: 10000
Total transferred: 17663542 bytes
HTML transferred: 14562912 bytes
Requests per second: 3519.43 [#/sec] (mean)
Time per request: 2.841 [ms] (mean)
Time per request: 0.284 [ms] (mean, across all concurrent requests)
Transfer rate: 6070.66 [Kbytes/sec] received

ちなみにIIS7は8500RPS (>>457

つまり、IIS7>Apache2.2(Linux)>Apache2.2(Win32)