AI settlers and water walking

[teelaurila]

Is it just me, or does it seem AIs with access to water walking settlers (black & green) get off to far better starts than others? (presently on master with all fair)
Lizardmen get a good start too, but their overall mediocricity does hit in. Not so with black/green Myrrans with anything but trolls.

Blue should have access to likewise settler mobility, but likely the buff is easier for the AI than floating island.

[Seravy]

It might be because green and black are strong early (high strategic value summons and/or undead creation) while Sorcery is medicore, chaos and life outright weak. But this matches how these realms work for humans, so I'm not worried too much.