I had a feeling the Unicorn vs. Narwhal results would end up like that. I chose Team Unicorn and never faced another Team Unicorn whereas other people I knew who picked Narwhal found other Team Narwhals. The Team Unicorn people also tended to play in a somewhat scared style, staying deep within their own ink. Some also didn't know how to use the Inkfurlers in Shifty Station.
The result was that, more often than not, the Team Narwhal people overran us, even when I was using the Sploosh-o-matic, my best weapon. The Sploosh-o-matic can only splat by ambush or flanking, and the Narwhal people covered the stages so thoroughly that I could do neither (or my teammates tended to give me away by staying close to me when I'm hiding around a corner trying to get oponents passing by).