Listed below are all the DEFAULT settings in syslog-ng.conf from v2.0.9-4.1 
for Debian. I've removed the comments and breaks on output for easier viewing.
1. OPTTIONS
2. SOURCES
3. DESTINATIONS
4. FILTERS
5. OUTPUT


1. OPTIONS:
options {
        chain_hostnames(0);
        time_reopen(10);
        time_reap(360);
        #sync(0);
        log_fifo_size(2048);
        create_dirs(yes);
        #owner(root);
        group(adm);
        perm(0640);
        #dir_owner(root);
        #dir_group(root);
        dir_perm(0755);
        use_dns(no);
        #log_msg_size(2048);
	stats_freq(0);
	bad_hostname("^gconfd$");
};

2. SOURCES:
source s_all {
        internal();
        unix-stream("/dev/log");
        file("/proc/kmsg" log_prefix("kernel: "));
        # udp();
};

3. DESTINATIONS:
destination df_auth { file("/var/log/auth.log"); };
destination df_syslog { file("/var/log/syslog"); };
destination df_cron { file("/var/log/cron.log"); };
destination df_daemon { file("/var/log/daemon.log"); };
destination df_kern { file("/var/log/kern.log"); };
destination df_lpr { file("/var/log/lpr.log"); };
destination df_mail { file("/var/log/mail.log"); };
destination df_user { file("/var/log/user.log"); };
destination df_uucp { file("/var/log/uucp.log"); };
destination df_facility_dot_info { file("/var/log/$FACILITY.info"); };
destination df_facility_dot_notice { file("/var/log/$FACILITY.notice"); };
destination df_facility_dot_warn { file("/var/log/$FACILITY.warn"); };
destination df_facility_dot_err { file("/var/log/$FACILITY.err"); };
destination df_facility_dot_crit { file("/var/log/$FACILITY.crit"); };
destination df_news_dot_notice { file("/var/log/news/news.notice" owner("news")); };
destination df_news_dot_err { file("/var/log/news/news.err" owner("news")); };
destination df_news_dot_crit { file("/var/log/news/news.crit" owner("news")); };
destination df_debug { file("/var/log/debug"); };
destination dp_xconsole { pipe("/dev/xconsole"); };
destination du_all { usertty("*"); }; 

4. FILTERS:
filter f_auth { facility(auth, authpriv); };
filter f_syslog { not facility(auth, authpriv); };
filter f_cron { facility(cron); };
filter f_daemon { facility(daemon); };
filter f_kern { facility(kern); };
filter f_lpr { facility(lpr); };
filter f_mail { facility(mail); };
filter f_news { facility(news); };
filter f_user { facility(user); };
filter f_uucp { facility(uucp); };
filter f_at_least_info { level(info..emerg); };
filter f_at_least_notice { level(notice..emerg); };
filter f_at_least_warn { level(warn..emerg); };
filter f_at_least_err { level(err..emerg); };
filter f_at_least_crit { level(crit..emerg); };
filter f_debug { level(debug) and not facility(auth, authpriv, news, mail); };
filter f_messages { level(info,notice,warn) and not facility(auth,authpriv,cron,daemon,mail,news); };
filter f_emerg { level(emerg); };
filter f_xconsole { acility(daemon,mail) or level(debug,info,notice,warn) or (facility(news) and level(crit,err,notice)); };

5. OUTPUT:
log { source(s_all); filter(f_auth); destination(df_auth); };
log { source(s_all); filter(f_syslog); destination(df_syslog);};
#log { source(s_all); filter(f_cron); destination(df_cron); };
log { source(s_all); filter(f_daemon); destination(df_daemon); };
log { source(s_all); filter(f_kern); destination(df_kern); };
log { source(s_all); filter(f_lpr); destination(df_lpr); };
log { source(s_all); filter(f_mail); destination(df_mail); };
log { source(s_all); filter(f_user); destination(df_user); };
log { source(s_all); filter(f_uucp); destination(df_uucp); };
log { source(s_all); filter(f_mail); filter(f_at_least_info); destination(df_facility_dot_info); };
log { ource(s_all); filter(f_mail); filter(f_at_least_warn); destination(df_facility_dot_warn); };
log { source(s_all); filter(f_mail); filter(f_at_least_err); destination(df_facility_dot_err); };
log { source(s_all); filter(f_news); filter(f_at_least_crit); destination(df_news_dot_crit); };
log { source(s_all); filter(f_news); filter(f_at_least_err); destination(df_news_dot_err); };
log { source(s_all); filter(f_news); filter(f_at_least_notice); destination(df_news_dot_notice); };
log { source(s_all); filter(f_debug); destination(df_debug); };
log { source(s_all); filter(f_messages); destination(df_messages); };
log { source(s_all); filter(f_emerg); destination(du_all); };
log { source(s_all); filter(f_xconsole); destination(dp_xconsole); };