I believe so, the claim is that Sky will be showing more than 60 NBL games this year.
You are right, these things would take a long time to prove definitevly, however the prominence that the Breakers get in the media over there is as much as the NZNBL and Tall Blacks combined, if not more.
They also run a Breakers academy for young players (which BBNZ prob cant afford to do), and give a genuine career pathway for NZ basketballers that wasnt there previously (I know it is viewed that way too after interviewing Junior Tall Blacks players).
I think the stats show that the away team has little or no bearing on NBL attendances or TV audiences. I also think the Breakers playing midweek home games limits the scheduling hassles, and from my experience flights to Auckland are often cheaper than to Perth or Far North Queensland.
Yes there are negatives, but if their presence creates 75 more TV broadcasts for the NBL this year, even with only an average of 20,000 viewers, that is 1.5 million extra sets of eye balls seeing the league and clubs, and their sponsors. I think that is a positive result.
Just out of interest and off topic, I would say the Tall Blacks best performance (as opposed to result) was at the 2004 Olympics.