I believe that's supposed to read "+2 to Matrix Tests" on page 266. That wouldn't be the only typo in that sentence.
There we have it, folks. Likely the most official answer we're likely to see in a while.
For those keeping notes at home, based on ClaytonCross's options, I believe we are going with option C: the text in the Rigger chapter is a typo and should read +2 just like it says in the Matrix chapter.
Personally, ClaytonCross, I had completely missed the section from the Rigger chapter that you quoted. I had thought you were referring to the Control Rig bonuses listed in the Gear Chapter. Had I realized you were comparing the two quotes you posted I probably would have erred on the side of A or C myself. I would have gone with A because I would have taken that change as a "specific trumps general" with Riggers benefiting from the Control Rig bonus as well as the hot-sim bonus, I would have read that as a balancer...