>>12
Look here: http://stats.2ch.net/suzume.cgi?yes
Boards post rates fluctuate all the time, though, so my comment might be off.
For a comprehensive view about what ID types are enabled on each 2ch board, please see:
http://www.d1.dion.ne.jp/~noripo/etc/2ch_id.html
and http://www.d1.dion.ne.jp/~noripo/etc/2ch_id2.html
(See also http://ansitu.xrea.jp/guidance/)
Trivia: To see all the config settings of a 2ch board, just append SETTING.TXT to its URL:
http://etc3.2ch.net/qa/ → http://etc3.2ch.net/qa/SETTING.TXT
PS:
強制ID = FORCED_ID
IDなし = ID Disabled
任意ID = Arbitrary ID (ID disabled if something is in your E-Mail field)
Even more trivia:
Some boards have even funkier settings, >>14 lists just the main ones.
強制IP = FORCED_IP → your IP is included with each post.
IDなし+任意リモホ = Arbitrary ID + "Rimoho"(?) (I don't really understand this one, the info may be outdated but the morning coffee board (second/most popular board on 2ch) has this one)
強制リモホ = FORCED_"Rimoho"(?) - again, no idea
半強制ID = Half-compulsory ID (only certain keywords/regexps will hide your ID)
"Rimoho" is short for "Remote Host" (リモートホスト)