тоже самая проблема, время ожидание начиная от 5 секунд и иногда бывает выше, но не меньше.
вот мой конфиг:

[code]
#######################################################################
#
# This is the main Nginx configuration file.
#
# More information about the configuration options is available on
# * the English wiki - http://wiki.codemongers.com/Main
# * the Russian documentation - http://sysoev.ru/nginx/
#
#######################################################################

#----------------------------------------------------------------------
# Main Module - directives that cover basic functionality
#
# http://wiki.codemongers.com/NginxMainModule
#
#----------------------------------------------------------------------

user www;
worker_processes 8;
worker_rlimit_nofile 8192;

error_log /var/log/nginx/error.log;
#error_log /var/log/nginx/error.log notice;
#error_log /var/log/nginx/error.log info;

pid /var/run/nginx.pid;

timer_resolution 100ms;

#----------------------------------------------------------------------
# Events Module
#
# http://wiki.codemongers.com/NginxEventsModule
#
#----------------------------------------------------------------------

events {
worker_connections 4096;
use kqueue;
}

#----------------------------------------------------------------------
# HTTP Core Module
#
# http://wiki.codemongers.com/NginxHttpCoreModule
#
#----------------------------------------------------------------------

http {
include /usr/local/etc/nginx/mime.types;
default_type application/octet-stream;

log_format main '$remote_addr - $remote_user [$time_local] $request '
'"$status" $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';

access_log off;

sendfile on;
#tcp_nopush on;
client_max_body_size 10M;

#keepalive_timeout 0;
keepalive_timeout 65;
send_timeout 140;
client_body_timeout 140;
client_header_timeout 140;

gzip on;
charset utf8;

include hosts/fun3.conf;
include hosts/wp3.conf;
include hosts/wp-rdirect.conf;
include hosts/live.conf;
include hosts/cacti.conf;
#include hosts/test.conf;
}

[/code]