Here are the types with the average amount of time between "latest posts" on the first pages of their respective forums (Hours:Mins:Secs):
INFJ: 00:24:37
INFP: 00:34:41
INTJ: 00:49:30
INTP : 01:15:00
ENTP: 02:59:53
ENFP: 03:26:09
ENFJ: 05:39:03
ISTP: 05:58:47
ISTJ: 06:53:56
ISFP: 08:12:56
ENTJ: 08:59:53
ISFJ; 09:02:56
ESTP: 12:24:44
ESTJ: 23:25:37
ESFJ: 30:31:56
ESFP: 30:39:06
(Note: This does not take into account time between posts of the same thread.)
INFJ: 00:24:37
INFP: 00:34:41
INTJ: 00:49:30
INTP : 01:15:00
ENTP: 02:59:53
ENFP: 03:26:09
ENFJ: 05:39:03
ISTP: 05:58:47
ISTJ: 06:53:56
ISFP: 08:12:56
ENTJ: 08:59:53
ISFJ; 09:02:56
ESTP: 12:24:44
ESTJ: 23:25:37
ESFJ: 30:31:56
ESFP: 30:39:06
(Note: This does not take into account time between posts of the same thread.)