Shivans: lag monsters

I'm willing to admit this may just be a Mac issue, but thought I'd mention it anyway.

The shivans in the tutorial seem to be horrendous graphics-lag generators. I'm not sure what it is about them — maybe the fact that they don't seem to have "solid" models, i.e. they're sort of "see-through", much like the walls and floors in Arachnos bases where I often experience similar lag — and it may simply be that my Mac's video card just has trouble with things like that. I'm "blaming" the shivan models because the lag goes away once all of them are killed in the second part of the tutorial, right before the giant shivan appears. And I don't get the lag with the giant shivan. Once I'm past the tutorial and into Atlas Park or Mercy Island, everything is fine.

I mention this mainly to point out that the amount of lag in the tutorial gives a really bad "first impression" to a new player. If this is the first thing they see after character creation, graphics lag so bad that it's hard to even move their character, some may think their computer just can't handle the game, and not proceed past it and discover the lag goes away after the tutorial.