I think both the posters you quoted make valid points, maybe not so eloquently. Without enough setback, most will end up with too much pressure on the hands. There is also the school of thought that a more "forward" position puts a greater emphasis on the quads, while a more set-back position allows the large glutes and other hip muscles to be engaged, resulting in more energy efficency for the rider especially over the long run. I tend to believe this school of thought based on personal experience.

As mentioned before, there are many factors that affect where the rider should sit in relationship to the BB (the length of femurs, seat tube angle, personal preferences, etc.). If I recall correctly, your bikes are set up in a relatively "forward" position and that seems to work for you. On the other hand, mine are set up with the saddle 10 cm behind the BB, and that works for me. In fact, if I sit too far forward, I end up with a lot of pressure on my hands and can't generate the same amount of power for extended periods.