If you would think that an average score was 100 (with Goorjian teams scoring more like 85-90), then with game time reducing down to 83% of previous, you could expect that scoring will go down to more like 85 average (with Dragons aiming for 70-75 a game).
I know that high scoring doesn't mean a good game, but for the average "punter" (and I would also include myself in that), I would much rather see a 125/122 game (with minimal defence played) than a grind em out 84/81 game.
To me, I think that although this would bring us in line with FIBA and International Games, it could possibly not bring in new spectators to the games. A lot of people may just think the standard slipped, not that the games were shorter.
I also think Isaac's point about minutes could be important. In the shorter game, there is only 200 minutes per team to share, not the current 240 minutes. If the 5 starters play their 32-35 minutes a game, you only need a total of 35-50 minutes off the bench, meaning positions 9-12 are very unlikely to see the court (even in blowouts). Will that help the development of the younger guys?