[Tamar]

As with most things in our hobby, its a guideline, and as such it can be an aide in designing tracks (home and club) that are fun to drive and provide close competition.
But when it becomes dogma (thou shall not have unequal length tracks) it can result in exactly the opposite, boring tracks, no fun to drive and as such bad competition.

I would rate equal length track way down on the priority list on track design:

1. Avialable space
   
2. Track theme
   
3. Visibility
   
4. Acces : driver and marshalls
   
5. Challenging/ Fun to drive
   
6. Equal track length 
   

with kind regards
Tamar