I would be interested in savegames too.
For WormAI my guess would be that it is usually not the fastest starter and will perform better on longer runs.
For NoNoCAB it's more surprising. In general it should perform similar to NoCAB since it is based on that.
What limits on vehicles did you have, ai difficulty setting, size of map, terrain and amount of water are settings that might influence performance of ai's.
Is Grinchios a new AI. I don't see it in the online content.
I'm sorry to hear CivilAI performed so poorly for you. I'm currently working on a major update for OpenTTD 1.9, so if you have any example savegames in which the AI is struggling I'd be interested to see them.
Ah, sorry guys, I didn't save the games
I'll remember to do so later
Usually the Temperate Map (But also desert and arctic)
500,000 max loan
1024x1024 size map
No custom assets, just vanilla vehicles and carriages
For CivilAI, it seemed that it was a little reluctant to start routes as it was always searching for the best one. Unfortunately, since I usually put the AIs up against 5-6 others, they were crowded out by more aggressive AI
I was surprised about NoNoCAB too, that the original version seemed to perform much better in which routes to go for
WormAI was actually pretty good, just not as good as the ones listed above it
I think grinchios is listed in the AI page under mungo (But I cant remember)