I think you are both right.
Those visual parking aids, usually called Docking Systems or Safegates, are indeed available only in the FSX version of our later sceneries, because we *integrate* them in the ParkMe feature, providing a more elegant way of using them, because you can decide where to park from a menu, the relevant safegate will turn on, airplane will be detected automatically, and you'll get even the final parking evaluation in the end.
All of this logic is handled with our FSX scripting engine called Couatl, which is based on the Phyton language, and it give us lots of advantadges over the old BGL "programming", both in expression power (we have a real object oriented language available, to create very complex logic) and in performances as well, because using a client server model, and running in a separate .EXE file, we are entirely multithreaded, without impacting flightsim performances a bit, even when running the most complex logic, because the scripting engine runs in the background, exploiting unused processing power, which is usually available when running on at least a Dual Core machine.
So, moving away from the old style FS9 BGL programming, allows us for much more flexibility and room to grow in the future. We have a whole program, XPOI, that is written entirely with this engine and it's *far* more complex than a simple Safegate, which gives an idea how much powerful it is.
The downside of it, we had to left FS9 behind for this. Yes, at Zurich we have Safegates in FS9 as well, because those were made using BGL programming. However, this kind of interactivity was deemed to be phased out in FSX, since the native FSX SDK promotes a much different way to create interaction and smart objects, which is centered on Simconnect.
About KLAS Safegates, yes, from an European point of view, it might looks strange a big airport like this, with jetways and all, doesn't have them, when in Europe, even a way smaller airport like Milano Linate have them, but that's just the way it is, and so is KFLL.
There aren't many airports in the US using Safegates, they are starting to be introduced now, but the most common way of parking assistance in the US is still marshalling. I think that KLAS has been scheduled to start implementing the first Safegates sometime in 2010, so we decided to put some on the newest Terminal anyway.