Actually, Haze proved that mediocre looking FPSs can get hype if they are PS3 exclusive, and Killzone 2 proved that PS3 exclusive FPSs can get hype even if the developer has a bunky track record. I'm sure if Conduit was a PS3 exclusive, there'd be a pretty similar distinguished mentally-challenged fellow jamboree happening over there, just with different avatars.
To be fair to Haze, the developer did put out four good games and there was reason to look forward to it.
To be fair to Killzone 2, a lot of the hype could have come from the graphics alone. I would say Liberation showed that they were capable devs, but it doesn't seem like a lot of people played it.
To be fair to The Conduit, it doesn't look awful and even if they're unproven, so were the devs behind Dead Space and that game turned out good.
But yeah, Haze and Killzone 2 hype was because they were PS3 exclusive and The Conduit is because it's for the Wii.