1. 9.09   Artw
2. 8.51   The Whelk
3. 6.88   EmpressCallipygos
4. 6.06   hippybear
5. 5.98   cortex
6. 5.09   jessamyn
7. 5.06   delmoi
8. 4.84   praemunire
9. 4.77   homunculus
10. 4.59   empath

1. 2167   Fizz
2. 2055   filthy light thief
3. 1688   the man of twists and turns
4. 1515   homunculus
5. 1505   hippybear
6. 1430   Artw
7. 1329   The Whelk
8. 1298   mathowie
9. 1092   chavenet
10. 1061   MartinWisse

1. 55500   Artw
2. 36270   The Whelk
3. 36049   homunculus
4. 33791   delmoi
5. 29068   hippybear
6. 23518   ericb
7. 23028   EmpressCallipygos
8. 22246   Justinian
9. 21507   jonmc
10. 21397   empath

1. 528   mathowie
2. 252   cortex
3. 197   Eyebrows McGee
4. 173   MiguelCardoso
5. 125   jessamyn
6. 124   taz
7. 110   Fizz
8. 109   WCityMike
9. 105   pb
10. 105   signal

Updated Apr 11, 2024

Excellent question. It is simply the sum of all the times a user has posted on Metafilter (comments or posts in any section of MeFi) divided by the number of days they have been a member.

Tamim's user profile discusses the idea and while reading this discussion I saw moz's reference to tamim's user page. After reading that and seeing tamim's suggestion, I wrote a quick script to do it. If you see any problems please let me know.