At the moment the only skills that are really implemented are Stealth. I would hazard a guess and say that all the skills associated with A/E are also implemented in that regard, but I'm not 100% sure on that matter. Otherwise, I do not believe any skills are implemented that affect any of their duties as of the moment.
Speed also affects your party speed. If you have a speed of one, and any NPCs in your party have a speed of zero, your whole group will move at speed of zero. At least, that's how it was before squads were introduced, so I don't know if that has changed.
Light speed is too slow! We're going to have to go right to...Ludicrous speed.