You’re speculating that he’s speculating because you don’t know that he doesn’t know. In fact, it’s pretty easy to get some idea of what people are thinking even if by just reading their comments on the recent video. Just needs a bit of interpretation and you get a general idea.
The sides were asymmetrical in ways that make the game fun for the humans, regardless of the complete lack of coordination by the ai. I don’t need to explain because you’ve played it. The level of symmetry in Brink (team size, respawn time/availability?, no zombie minions and map balancing) is far closer to a traditional multiplayer than l4d1-2. That puts a lot more pressure on the ai in Brink.
I’ve raised my concerns about what ai/singleplayer will be versus what people might be expecting, elsewhere, and don’t really mean to repeat myself but you really shouldn’t go too far with comparisons to l4d.