It can take a beating, I've seen it. But I bet guys who fly the 767 domestic see a lot worse rides more often and could give you better feed back. Seems to me most international flying is smoother than domestic. But turbulence in a 767 has a different feel then an RJ hitting turbulence. I'm not going to say its better or worse, its just different.

But according to the Captains its 3 times worse in the back, say way back of the plane, then it is in the cockpit. I always wanted to say, okay hold on, and run to the back to see if thats true. The logistics of that stunt never worked out, so I just took their word for it.

As to the east vs west bound rides, I've had bad rides at night and smooth in the day and vice versa. It really depends on whats out there on the track. I used to see a good bit of turbulence around the equator going to South Ameirca, it did fine.