^^Edit^^ just downloaded and looked @ The UT2 Manual and indeed their is an option for jetways to attach to AI.I haven't noticed this happening in any of the FSDreamteam airports so I'll have to check it out.
Since our jetways are FSX-native, there shouldn't be any problems to have them attached to AI, provided the AI has the door correcly flagged in the aircraft.cfg, in FSX style. In fact, they work with FSX default AI models.
The reason why UT2 has this as an option, it's because attaching jetways to AI can be very heavy on fps with many AIs, because of the large number of bones animations.
However, our jetways are very much optimized. On top of having several LODs levels, the animation is attached only to the highest LOD. The advantage of this, is that the impact of fps is not very high, even when using them with AI. The disadvantage, is that you'll see the jetways moving only when the viewpoint is close, which is why you might haven't noticed for AI: you need to go close to the AI to see the attached jetway. Of course, assuming the AI does support jetways.