Could be that they were flying on an empty map with one player aircraft?
Maybe it didn't scale well when they started to put more objects into the sim.
Though looking back at that video, you can see why they were optimistic about the capabilities of their sim.
Personally I think the landscape works fairly well, once we get the trees collisions and shadows working nap of earth flying will be one of the highlights of this sim.
Tree! Did you really say "I've been talking crap 2 years before the release of this game"? I recon that ones going to be locked up in the arsenal with all the other out of context quotes for use at an unspecified time in the future!
Catch you all online sometime!