On Rennlist and Dorkiphus the user ID also includes a post count for that user. I find it helpful, as it tends to provide an indicator of how long that person has been on the board and, at least theoretically, how knowledgeable and/or involved they are - it allows me to weight their comments in my own thought process and adjust my own comments based on how much explanation I may think they need.
1998 986 Turbo-Look Cab
172,000 Miles
Dilithium Crystal Supercharger